Step-by-step explanation:
you understand how a function works ? you provide an input value, the argument to the function, and by following the calculation rules of the functional expression you get a result value.
here, the functional expression is very simple : multiply the input value by 2.95. that's it.
you can't think of 4 input values (= how many gallons of gas you are buying) ? and then do that simple multiplication with them ?
really ?
let's start with the simplest of all choices.
I buy 0 gallons.
c = 2.95×0 = 0
ha ! who would have thought ? buying no gas costs no dollars ...
so, or first ordered pair is (0, $0).
then 1 gallon
c = 2.95×1 = 2.95
ordered pair (1, $2.95)
then e.g. 10 gallons
c = 2.95×10 = 29.50
ordered pair (10, $29.50)
then e.g. 100 gallons
c = 2.95×100 = 295
ordered pair (100, $295)
