Unit 4 Test Review #1

Here is the graph that represents a function.

Which equation best represents the function?

• f(x) = |x| + 3

• g(x) = |x| - 3

• h(x) = |x + 3|

• j(x) = |x - 3|

Based on the graph and situation, which domain and range best fits the data shown?

• Domain: all numbers from 0 to 10
  Range: all numbers from 0 to 8

• Domain: whole numbers from 0 to 10
  Range: whole numbers from 0 to 10

• Domain: all numbers from 0 to 8
  Range: all numbers from 0 to 10

• Domain: whole numbers from 0 to infinity

  Range: all numbers from 0 to infinity

The equation t = 2c, gives the total cost, t that each cookie c costs. If a customer bought 200 cookies for a party, what would the total cost be?

• t = $2

• t = $400

• t = 100

• The cookies would be free

The equation t = 2c, gives the total cost, t that each cookie c costs. Write the inverse function.

• c = 2t

• c = t

• c = t / 2

• c = 2 / t

What axis represents domain values?

• Neither x nor y values

• x values

• y values

• x and y values

What axis represents range values?

• Neither x nor y values

• x values

• y values

• x and y values

The cost of scholars who want to eat lunch at Catalyst High School is a function of s, the number of scholars who want to eat lunch provided by the. The cost function, C, can be represented with this set of rules:

C(s) = $4.00, 0 < s ≤ 5

$7.00, 5 < s ≤ 12

$9.00, 12 < s ≤ 30

How much does it cost if 5 scholars want to eat lunch?

• $4

• $7

• $9

• $20

The cost of scholars who want to eat lunch at Catalyst High School is a function of s, the number of scholars who want to eat lunch provided by the. The cost function, C, can be represented with this set of rules:

C(s) = $4, 0 < s ≤ 5

$7, 5 < s ≤ 12

$9, 12 < s ≤ 30

How much does it cost for 29 scholars to eat lunch?

• $4

• $7

• $9

• $20

The cost of scholars who want to eat lunch at Catalyst High School is a function of s, the number of scholars who want to eat lunch provided by the. The cost function, C, can be represented with this set of rules:

C(s) = $4.00, 0 < s ≤ 5

$7.00, 5 < s ≤ 12

$9.00, 12 < s ≤ 30

Graph the function and label the axes on the given coordinate plane.

Function m is defined by the equation c(m) = 35 + 5m. It gives the cost, in dollars, of renting a motorcycle as a function of the number of hours a person can rent the motorcycle.

Find the value of c(5).

• 35

• 60

• 70

• 5