Mat 1101 Test 2 Worksheet With Answers - 2010 Page 2
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214. Jimmy has $25 in his piggy bank, and he gets $7 per week for allowance. Jimmy has decided that he wants
to save his entire allowance every week until he has enough to buy something he wants. Let “y” represent the
amount of money Jimmy has after saving his allowance for “x” weeks.
a) What is the rate of change
b) How much money does
c) Find the equation of the line y.
of cost per week?
Jimmy start out having?
$7 per week
$25
y = 7x + 25
d) How much money will Jimmy have in his
e) If Jimmy is saving for a toy costing $120, for
piggy bank after 5 weeks of saving his money?
how many weeks will he have to save his money
in order to afford the toy?
$60
14 weeks
15. A trip to Las Vegas on Amtrak for a family of 2 people costs $466, while the same trip for a family of 4
people costs $766. Let “y” represent the cost of the trip to Las Vegas for a family with “x” people.
a) How much is the cost
b) Find the equation of the line y.
c) How much would it cost a family of
per person?
five to make the trip to Las Vegas?
$150 per person
y = 150x + 166
$916
c) What is the cost of the flat fees associated
d) How many people from a family can travel for $1216?
with taking the Amtrak to Las Vegas?
$166
7 people
16. The number of gallons of oil spilled into the Gulf of Mexico during the BP oil spill after “x” days can be
estimated by the equation G(x) = 40,000x.
a) What is the average rate of change of
b) How much oil had been spilled after 14 days?
the number of gallons of oil spilled per day?
40,000 gallons per day
560,000 gallons
c) If the oil spill is stopped after 100 days, how
d) How many days did it take for 1 million gallons
much oil was spilled over the time period?
of oil to be spilled into the Gulf?
4,000,000 gallons
25 days
17. Kim can buy 3 dolls and 4 toy trucks for $64.00, or she could buy 6 dolls and 2 toy trucks for $68.00. How
much would one toy truck cost?
$10 for one toy truck
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