2.2: Linear Equations

Question 1

Linear Function

Answer 1

A function whose graph is a line

Question 2

Linear Equation

Answer 2

Represents a linear function. A solution of a linear equation is any ordered pair (x,y) that makes the equation true

Question 3

Dependent Variable

Answer 3

y= 3x+2. Since the value of y depends on the value of x, y is called the dependent variable

Question 4

Independent Variable

Answer 4

y = 3x + 2. x is called the independent variable

Question 5

y-intercept

Answer 5

Point at which the line crosses the y-axis

Question 6

x-intercept

Answer 6

Point at which the line crosses the x-axis

Question 7

Standard form of a linear equation

Answer 7

Ax+By=C, where A,B, and C are real numbers, and A and B are not both zero.

Question 8

Slope

Answer 8

a non-vertical line is the ratio of the vertical change to a corresponding horizontal change.

Question 9

Point-slope form

Answer 9

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

Question 10

Slope-intercept form

Answer 10

You can use this to find slope by examining the equation