Question

F-LE.1c. Recognize situations in which a quantity grows or decays by a constant percent rate per unit interval relative to another. 1. The table below shows how the expected values of a computer and a printer vary with time. Time (years after purchase) Value of Computer Value of Printer 0 $960 $300 $720 $240 2 $540 $180 3. $405 $120 Based on the data in the table, which of the two devices decays in expected value by a constant

Answer 1

When a quantity changes by a constant rate we can fit the data of the quantity with a line, then by plotting the given data we can see which of the two devices decays in expected value by a constant, like this:

• For the variable "value of computer"

• For the variable "Value of printer"

As you can see, when we graph the data in the table, we can see that the value of the printer varies linearly in terms of time, then this device decays by a constant value.

Then, the answer is the printer