Math 112 Final Exam Study Aid Worksheet With Answer Key Page 17
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39Math 112
Final Exam Study Aid
17 of 39
54. The table below shows a person’s monthly payment, P , as a linear function of the
amount of money borrowed, b, in thousand of dollars, for a home loan at an interest
rate of 5%.
P (monthly payment)
$5.37 $10.74 $16.11 $21.48 $26.85
b (amount borrowed in 1000s)
1
2
3
4
5
Find the slope of this linear function and give a practical interpretation.
(A) Slope = 5.37 ; Every 1 thousand dollars you borrow raises your monthly payment
by $5.37.
(B) Slope = 5.37 ; Every dollar your monthly payment goes up, the amount borrowed
increases by $5370.
(C) Slope = 0.19 ; Every 1 thousand dollars you borrow raises your monthly payment
by $0.19.
(D) Slope = 0.19 ; Every dollar your monthly payment goes up, the amount borrowed
increases by $190.
(E) Slope = 5.37 ; Every 1 dollar you borrow raises your monthly payment by $5.37.
55. Using the information in the table above, approximately how much would your monthly
payment be if you borrowed $250,000?
(A) $1,342,500
(B) $1,342.50
(C) $47,500
(D) $47.50
(E) None of the choices A-D
56. Find the equation of the line passing through the points (2, 1) and (4, 7).
The slope and y-intercept are:
slope y-intercept
(A)
3
(0,7)
1
1
(B)
(0,
)
3
3
1
5
(C)
(0,
)
3
3
(D)
3
(0, 5)
(E) None of these
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