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.
y= 0 1 2 3 4 5
f(x)10.00 10.02 10.04 10.06 10.08 10.10


What type of function is represented?

linear
quadratic
logarithmic
exponential

Answer 1

Linear. The output increases by a constant 0.02 for each additional text (constant rate of change), so f(x)=10+0.02x — a linear function.