Function Inverses — Unit test Answers

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

If m 0, the graph of y = mx + b does not pass through which quadrant?

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?

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?

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

The graph of f(x) is shown below.If g(x) and f(x) are inverse functions, which graph represents g(x)?

Which of the following is an odd function?

What is the domain of the relation graphed below?

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]?

If g(x) is an odd function, which function must be an even function?

The height in feet, h, of a model rocket t seconds after launch is given by the equation . The average rate of change in h(t) between t = 1 second and t = 3 second is 6. What does the average rate of change tell you about the rocket?

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

Which description could be written as a linear function?

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

Which equation represents a linear function?