Interpreting Functions Review

The function c(m) = 1.45m + 3.50 represents the cost of a taxi for m miles.
What does c(7) represent?

• cost of $7 to ride the taxi

• cost to ride 7 miles

• minimum distance to ride a taxi

• minimum cost of a taxi

Tags

CCSS.HSF.LE.B.5

The math club goes to an amusement park. Student tickets cost $10 each. The bus costs $28. This is expressed as f(x) = 10x + 28. Find f(4) and explain what it means.

• f(4) = 40; It costs $40 for 4 students to go on the trip.

• f(4) = 68; 68 students can go on the trip.

• f(4) = 68; It costs $68 for 4 students to go on the trip.

• f(4) = 28; 28 students can go on the trip

Tags

CCSS.HSF.LE.B.5

• The initial number of bacteria is 12.

• The number of bacteria at the end of one day is 245.

• The initial number of bacteria decreases at a rate of 88% each day.

• The number of bacteria increases at a rate of 12% each day

Tags

CCSS.HSF.LE.B.5

The function d(x) where x=gallons of gas and d(x)= # of miles traveled.
Interpret d(8)=300 in context.

• A car with 8 gallons of gas can travel 300 miles.

• A car traveling 8 miles has 300 gallons of gas.

• A car is traveling 300 miles.

• The car traveling 8 mph can go 300 miles.

Tags

CCSS.HSF.LE.B.5

Does the mapping diagram represent a function? Explain.

• No; the input values (x-values) of 1 and 3 are both paired with the same output (y-value).

• No; there are more input values (x-values) than output values (y-values).

• Yes; each input (x-value) is paired with only one output (y-value).

• You can't tell if a relation is a function from a mapping.

Tags

CCSS.8.F.A.1

Which graph is a function?

• Graph #1

• Graph #2

• Graph #3

• They are all functions

The temperatures in NYC were tracked in this graph.

What does the point (3, 50) represent?

• On the third day, it was 50 degrees F.

• It was only 3 degrees F on day 50.

• The temperature rose 3 degrees on day 50.

• None of these.

Tags

CCSS.HSF.IF.B.4

What does the point (2, 4) represent?

• On day 2, you got 4 facts correct.

• You got 2 facts correct on day 4.

• You got a total of 6 facts correct.

• On day 3, you got 12 facts correct.

Tags

CCSS.HSF.IF.B.4

Which of the following is NOT a function?

• A

• B

• C

• None of these are functions

Tags

CCSS.8.F.A.1

What is f(1)?

• 1

• 5

• 0

• 4

Tags

CCSS.HSF.IF.A.2