Question

Juan recently entered into a contract for a cell phone plan. The table shows the monthly cost in dollars, f(x), if Juan sends x text messages.



What type of function is represented?

linear
quadratic
logarithmic
exponential

Answer 1

Linear.

A cell phone bill with a fixed base charge plus a fixed cost per text is a linear function: f(x) = base + (rate)x. The table would show equal increases in f(x) for equal increases in x.