Unit 4 Test- Writing the Equation of Linear Functions

What is the equation of the line in slope-intercept form with a y-intercept of 5 and a slope of -3.

Write the equation of the horizontal line passing through (4, –7).

Write an equation in slope-intercept form of the line that passes through (-7,-7) and (-3, 1). Show all your work below.

Match the following

• slope-intercept form

• standard form

• point-slope form

• none

Write the equation of a line in point-slope form that has a slope of 7 and goes through the point (9, -14).

The equation c = 2m+ 56 is used to model a monthly cell phone bill, where c is the total monthly charge and m is the number of minutes used.

Which of the following is true? Choose all that apply.

• If you talk 4 minutes your bill is $8

• If you talk 0 minutes your bill is $56

• If you talk 0 minutes your bill is $2

• Each minute costs $2

• Each minute costs $56

Write the equation -3x + 7y = 21 in slope-intercept form. Show all your work below.

Write the equation y - 3 = 5 (x - 2) in slope-intercept form. Show all your work below.