Question

The cost to mail a package that weighs x pounds at AAA
Shipping is represented by the table.

Cost to Mail a Package at AAA Shipping
Weight (in lbs.) 4 5 6 7 8
Cost (in dollars) 5.56 6.95 8.34 9.73 11.12
What type of function could be used to model the cost to mail a package as a function of weight?

(1 point)

quadratic function

exponential growth function

linear function

exponential decay function

Answer 1

Linear function.

The cost increases by a constant $1.39$ for each additional pound (6.95−5.56=8.34−6.95=...=1.39), so C(x)=1.39x (which matches the table).