FOA B Unit 3 Review 2022

Is the relation a function? Why?

• Yes, because the x-value 11 has two y-values paired with it.

• No, because the x-value 11 has two y-values paired with it.

• Yes, because each x-value has only one y-value paired with it.

• No, because each x-value has only one y-value paired with it.

Which ordered pair could you add to the following list of points to create a function? (3, 5) (4,9) (2,5)

• (3,7)

• (1,9)

• (4,1)

• (2,6)

A plumber charges a service fee of $40 plus $25 per hour for labor.

A. Write a function rule for the total cost of hiring the plumber for a job that takes x hours.

B. How much would it cost to hire the plumber for a job that takes 4 hours?

• A. y=40+25x B. $140

• A. y=40 +25x B. $185

• A. y=40x+25 B. $185

• A. y=40x + 25 B. $140

Find the function rule.

• y=-2x-10

• y=2x+10

• y=-2x+10

• y=2x-10

Which linear equation represents the graph?

• y=-3x-2

• y=-1/3x +2

• y=3x+2

• y=1/3x-2

Determine whether the sequence is arithmetic, geometric or neither.

200, 40, 8.....

• Arithmetic

• Geometric

• Neither

What are the next 3 terms in the sequence?

-6, -3, 0, 3...

• -9, -12, -15

• 6, 9, 12

• 9, 15, 21

The slope of the line x=-3 is _____.

• 1,000

• 0

• undefined

• -3

What is the rate of change for the following equation?

y=8x+6

• 1

• 6

• 8

• 8/6

At what rate did the rain fall?

• 2 cm per hour

• 1/2 cm per hour

• 1/4 cm per hour

• 4 cm per hour