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Fueling Up
Motorists often complain about rising gas prices. Some motorists purchase fuel efficient vehicles and participate in trip
reduction plans, such as carpooling and using alternative transportation. Other drivers try to drive only when necessary.
.
1.
Suppose you are at the gas station filling your tank with gas. The function
C
(
g
) represents the cost
C
of filling up
the gas tank with
g
gallons. Given the equation:
)
(
03
.
3
)
(
g
g
C
=
a)
What does the number 3.03 represent?
When we plug in g = 1, we get C(1) = 3.03 * 1 = 3.03
⇒
3.03 represents the price of 1 gallon of gas in dollars
It also means that for every 1 gallon more than you fill, you will need to pay $3.03 more
Find
C
(2)
C(2) = 3.03 * 2 = 6.06
This is the price in dollars of 2 gallons of gas
b)
Find
C
(9)
C(9) = 3.03 * 9 = 27.27
This is the price in dollars of 9 gallons of gas
c)
For the average motorist, name one value for
g
that would be inappropriate for this function’s purpose.
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 Spring '11
 acc101

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