2.2 Linear Equations

Question 1

Linear Function

Answer 1

a function whose graph is a line

Question 2

Linear Equation

Answer 2

you can represent a linear function, any ordered pair (x,y) that makes the equation true

Question 3

Dependent Variable

Answer 3

because the value of “y” depends on the value of “x”, y is called the dependent variable

Question 4

Independent Variable

Answer 4

because the value of “y” depends on the value of “x”, “x” is called the independent variable

Question 5

Y-intercept

Answer 5

the y-intercept of a line is the point at which the line crosses the y-axis.

Question 6

X-intercept

Answer 6

the x-intercept of a line is the point at which the line crosses the x-axis

Question 7

Standard form of a linear equation

Answer 7

is “Ax + By = C, where A, B, and C are real numbers , and A and B are not both zero. You can graph a linear equation in standard form by finding the x and y intercepts

Question 8

Slope

Answer 8

the slope of a nonvertical line is the ratio of the vertical change to a corresponding horizontal change. You can calculate slope by subtracting the corresponding coordinates of two points on the line

Question 9

Point Slope Form

Answer 9

when you know the slope and a point on a line, you can use the point slope form to write the equation of the line

Question 10

Slope Intercept Form

Answer 10

Another form of the equation of a line is slope intercept form, which you can use to find the slope by examining the equation