Question 322392
In the function {{{C(g) = 3.50(g)}}}, the C stands for the cost of the gas you put into your gas tank. The g stands for the number of gallons of gas you buy, and the 3.50 is the cost, per gallon, of the gas.
If you want to find out how much 7 gallons of gas wiil cost, you replace the g in the function with 7 and solve for C, thus:
{{{C(7) = 3.50(7)}}}
{{{C(7) = 24.50}}} You will interpret this to mean that the cost (C) of 7 gallons of gas (C(7)) is $24.50