Evaluating Simple Functions in Everyday Life

If f(x) = 3x + 2, what is f(4)?

• 14

• 16

• 12

• 10

A recipe calls for 2 cups of flour for each batch of cookies. If you make f(x) = 2x batches, how much flour do you need for 5 batches?

• 10 cups of flour

• 8 cups of flour

• 12 cups of flour

• 6 cups of flour

If f(x) = x - 7, what is the output when the input is 10?

• 10

• 3

• 5

• 2

A car travels 60 miles per hour. If f(t) = 60t, how far does the car travel in 3 hours?

• 120 miles

• 90 miles

• 240 miles

• 180 miles

If f(x) = 5x, how much will you earn if you work for 6 hours?

• 30

• 45

• 15

• 25

A plant grows 2 inches each week. If f(w) = 2w, how tall will the plant be after 4 weeks?

• 6 inches

• 8 inches

• 10 inches

• 4 inches

If f(x) = x + 5, what is f(0)?

• -5

• 0

• 5

• 10

A book costs $10 each. If you buy f(b) = 10b books, how much do you spend on 3 books?

• $30

• $15

• $20

• $40

If f(x) = 4x - 1, what is the output when the input is 3?

• 9

• 12

• 10

• 11

A movie ticket costs $12. If f(t) = 12t, how much do you spend on 5 tickets?

• $60

• $36

• $72

• $48