Unit 1 Part 2 TEST: Applications of Functions Answers

A radioactive element has a half-life of six days. What is the approximate decay rate of the element after the first day?

A business owner opens one store in town A. The equation represents the anticipated profit after t years. The business owner opens a store in town B six months later and predicts the profit from that store to increase at the same rate. Assume that the initial profit from the store in town B is the same as the initial profit from the store in town A. At any time after both stores have opened, how does the profit from the store in town B compare with the profit from the store in town A?

A 2-column table has 5 rows. The first column is labeled x with entries negative 2, negative 1, 0, 1, 2. The second column is labeled f (x) with entries one-eighth, one-fourth, one-half, 1, 2.

The graph represents the cost of a subscription to a newspaper.

Which graph represents a function with direct variation?

On a number line, a number, b, is located the same distance from 0 as another number, a, but in the opposite direction. The number b varies directly with the number a. For example b = 2 when a = –2. Which equation represents this direct variation between a and b?

The velocity of an object in meters per second varies directly with time in seconds since the object was dropped, as represented by the table.