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 equation EXAMPLE y = 3x + 2

Question 3

dependent variable

Answer 3

if a function is defined by an equation using x and y, then y is the dependent variable

Question 4

independent variable

Answer 4

if a function is defined by an equation using x and y, then x is the independent variable

Question 5

y intercept

Answer 5

the point at which the line crosses the y axis

Question 6

x intercept

Answer 6

the 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 (A and B aren’t 0)

Question 8

slope

Answer 8

the ratio of the vertical change to a corresponding horizontal change

Question 9

point slope form

Answer 9

the line through point (x1, y1) with slope m has the equation below
y-y1=m(x-x1)

Question 10

slope intercept form

Answer 10

you can find it by using the equation
y=mx+b
(m is slope, b is slope intercept form)