Linear Functions — Unit test Answers

Lionel computed the average rate of change in the depth of a pool over a two-week interval to be zero. Which statement must be true?

If f(x) is a linear function, what is the value of n?xf(x)377n9161626.5

The cost of producing x soccer balls in thousands of dollars is represented by h(x) = 5x + 6. The revenue is represented by k(x) = 9x – 2. Which expression represents the profit, (k – h)(x), of producing soccer balls?

Which of the following is an odd function?

If the function has an inverse function, which statement must be true?

If k(x) = 5x – 6, which expression is equivalent to (k + k)(4)?

The tables for f(x) and g(x) are shown below.xf(x)–5–11–21113529xg(x)–5–7–2–115513What is the value of (f – g)(5)?

A cashier earns $7 an hour. If x is the number of hours worked, which function represents the cashier’s earnings?

Which graph represents an even function?

If f(x) = x2 – 25 and g(x) = x – 5, what is the domain of ?

The graph shows the distance in miles of a runner over x hours. What is the average rate of speed over the interval [9, 11]?

Which statement verifies that f(x) and g(x) are inverses of each other?

Which description could be written as a linear function?

Which equation is represented by the graph below?

Which function is the inverse of ?