.
What is a Linear Equation?
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A linear equation is a type of equation that creates a straight line when graphed on a coordinate plane.
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Different Forms of Linear Equations:
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The standard form of a linear equation is: Ax+By=C, whereA, B, and C are constants.
The slope-intercept form is: y=mx+b, where m is the slope and b is the y-intercept.
The point-slope form is: y−y1=m(x−x1), where m is the slope and (x1,y1) is a point on the line.
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Understanding Slope:
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Slope is how much the line goes up or down for every step to the right.
A positive slope means the line goes up from left to right.
A negative slope means the line goes down from left to right.
Zero slope means the line is flat, like the floor.
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Y-intercept:
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The y-intercept is where the line crosses the y-axis.
It's the value of y when x is zero.
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Graphing Linear Equations:
.
To graph a linear equation, start at the y-intercept and use the slope to find another point.
Then draw a straight line through those points.
.
Finding Points on a Line:
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You can find points on a line by plugging in different values for x into the equation and solving for y.
.
Applications of Linear Equations:
.
Linear equations are used in many real-life situations, like calculating speed, predicting growth, or understanding relationships between variables.
Understanding these forms of linear equations will help you work with them more effectively!
What is a Linear Equation?
.
A linear equation is a type of equation that creates a straight line when graphed on a coordinate plane.
.
Different Forms of Linear Equations:
.
The standard form of a linear equation is: Ax+By=C, whereA, B, and C are constants.
The slope-intercept form is: y=mx+b, where m is the slope and b is the y-intercept.
The point-slope form is: y−y1=m(x−x1), where m is the slope and (x1,y1) is a point on the line.
.
Understanding Slope:
.
Slope is how much the line goes up or down for every step to the right.
A positive slope means the line goes up from left to right.
A negative slope means the line goes down from left to right.
Zero slope means the line is flat, like the floor.
.
Y-intercept:
.
The y-intercept is where the line crosses the y-axis.
It's the value of y when x is zero.
.
Graphing Linear Equations:
.
To graph a linear equation, start at the y-intercept and use the slope to find another point.
Then draw a straight line through those points.
.
Finding Points on a Line:
.
You can find points on a line by plugging in different values for x into the equation and solving for y.
.
Applications of Linear Equations:
.
Linear equations are used in many real-life situations, like calculating speed, predicting growth, or understanding relationships between variables.
Understanding these forms of linear equations will help you work with them more effectively!
Here's a summary of linear functions tailored for a middle school student:
What is a Linear Function?
A linear function is a type of equation that creates a straight line when graphed on a coordinate plane.
The Equation of a Linear Function:
The equation of a linear function looks like this:
y=mx+b.
m represents the slope, or how steep the line is.
b represents the y-intercept, or where the line crosses the y-axis.
Understanding Slope:
Slope is how much the line goes up or down for every step to the right.
A positive slope means the line goes up from left to right.
A negative slope means the line goes down from left to right.
Zero slope means the line is flat, like the floor.
Y-intercept:
The y-intercept is where the line crosses the y-axis.
It's the value of y when x is zero.
Graphing Linear Functions:
To graph a linear function, start at the y-intercept and use the slope to find another point.
Then draw a straight line through those points.
Finding Points on a Line:
You can find points on a line by plugging in different values for
x into the equation and solving for y.
Applications of Linear Functions:
Linear functions are used in many real-life situations, like calculating speed, predicting growth, or understanding relationships between variables.
Remember, with practice, you'll become a pro at working with linear functions!
What is a Linear Function?
A linear function is a type of equation that creates a straight line when graphed on a coordinate plane.
The Equation of a Linear Function:
The equation of a linear function looks like this:
y=mx+b.
m represents the slope, or how steep the line is.
b represents the y-intercept, or where the line crosses the y-axis.
Understanding Slope:
Slope is how much the line goes up or down for every step to the right.
A positive slope means the line goes up from left to right.
A negative slope means the line goes down from left to right.
Zero slope means the line is flat, like the floor.
Y-intercept:
The y-intercept is where the line crosses the y-axis.
It's the value of y when x is zero.
Graphing Linear Functions:
To graph a linear function, start at the y-intercept and use the slope to find another point.
Then draw a straight line through those points.
Finding Points on a Line:
You can find points on a line by plugging in different values for
x into the equation and solving for y.
Applications of Linear Functions:
Linear functions are used in many real-life situations, like calculating speed, predicting growth, or understanding relationships between variables.
Remember, with practice, you'll become a pro at working with linear functions!
① 当很难决定两个中选哪一个时，可以说It's quite a toss-up.
1 在服装店 Can I try this on?
Customer : Hi, I'm looking for play clothes for my daughter.
Clerk : We have just the thing. How about these overalls for little girls?Aren't they cute?
顾客：嗨，我想给我女儿买一套游戏服装。
店员：我们这里就有。这些给小女孩穿的背带裤怎么样？它们很可爱吧？
1 在服装店 Can I try this on?
Customer : Hi, I'm looking for play clothes for my daughter.
Clerk : We have just the thing. How about these overalls for little girls?Aren't they cute?
顾客：嗨，我想给我女儿买一套游戏服装。
店员：我们这里就有。这些给小女孩穿的背带裤怎么样？它们很可爱吧？
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