1. Linear Equations and Functions Words to KnowBy
Robert O. Mills Jr
Hermitage High School
Henrico County Public Schools

2. Linear equation
An equation whose graph is a straight line

3. Slope (M) A measure of the steepness of a straight line
Tells how fast one variable changes compared with the other.
Rise over run

4. Rise
The change between two points on a line in an up-and-down direction

5. Run
The change between two points on a line in a left-to-right direction

6. X-intercept
The x-value of an ordered pair at the point where a line crosses the x-axis
The x-value when the y-value is 0 (x,0)

7. Y-intercept (b)
The y-value of the ordered pair at the point where a line crosses the y-axis
The y-value when the x-value is 0.(0,y)

8. Slope-intercept form
m is the slope.
b is the y-intercept

9. Standard form

10. Direct variation K is a positive number.
As one variable increases, the other increases.