Linear Function Review

Jerome has $150 in his savings account and saves $40 per month. Write a linear function J(x) that will tell us the money Jerome has in his savings account after x months.

• J(x) = 150 + 40

• J(x) = 40x + 150

• J(x) = 150x + 40

• J(x) = 40 + 150

• slope: 1/6 y-intercept: 4 

• slope: 1/5 y-intercept: 5 

• slope: 5/1 y-intercept: 5 

• slope: 1 y-intercept: 5 

A plumber charges $50 for a house call plus $12 per hour for labor. The linear function P(x) represents the cost of the plumber for x hours.

P(x) = 50 + 12x

Find P(4)

• $86

• $98

• $110

• $74

Slope is another word for:

• Initial Value
• Rate of Change
• Change in Y's
• Y-intercept

Is this function linear or nonlinear?

• Linear
• Nonlinear

Is the table linear or nonlinear?

• Linear
• Nonlinear

Which graph is linear?

• Graph A
• Graph B
• Graph C
• Graph D

Find the slope from the table.

• -4

• 1

• 4

• -2

If the slope of a line is 3 and the y intercept is 6, what is the correct equation in slope intercept form?

• y=3-6

• y=3x-6

• y=3x+6

• y=6x+3

The Roaming Cell Phone Company charges $15.00 per month plus $2 per minute of airtime usage. The linear function C(x) represents the cost for x minutes of airtime usage.

C(x) = 2x +15

Solve C(x) = 23

• 4 minutes

• 3 minutes

• 2 minutes

• 5 minutes