2. Whenever you take out a loan or carry a balance on a credit card, you pay interest. The way that the interest is calculated depends on the type of loan. Simple interest loans are loans where you pay interest only on the amount you borrowed. Federally subsidized student loans and most car loans are simple interest loans. Credit cards debts are in essence loans, but they are not simple interest loans because each month any unpaid interest is added to the amount on which you pay interest. So you pay interest on your unpaid interest! Suppose you plan to borrow $5000 from your uncle to purchase a used car. Your uncle agrees to give you a simple interest loan at an interest rate of 8% and wants you to repay the loan and the interest in one lump sum. The graph below shows how the amount of time it takes you to repay the loan affects the amount you owe. a. How long does it take for your uncle to make $1000 on this deal? Dy. YE 8000 -7200 y= X+b -6400 -5600 b. What is the y-intercept? What does it tell us? -4800 4= 5000 The umount owed 4000 -3200 2400 Ду c. Calculate the rate of change for three pairs of Ar -1600 -800 points. What do you notice? What is the meaning of Ду the in this scenario? 0.5 1, 1.5 2 2.5 3 3.5 4 4.5 5 5.5 Length of Loan (years) X Ar ($) peMo uno
2. Whenever you take out a loan or carry a balance on a credit card, you pay interest. The way that the interest is calculated depends on the type of loan. Simple interest loans are loans where you pay interest only on the amount you borrowed. Federally subsidized student loans and most car loans are simple interest loans. Credit cards debts are in essence loans, but they are not simple interest loans because each month any unpaid interest is added to the amount on which you pay interest. So you pay interest on your unpaid interest! Suppose you plan to borrow $5000 from your uncle to purchase a used car. Your uncle agrees to give you a simple interest loan at an interest rate of 8% and wants you to repay the loan and the interest in one lump sum. The graph below shows how the amount of time it takes you to repay the loan affects the amount you owe. a. How long does it take for your uncle to make $1000 on this deal? Dy. YE 8000 -7200 y= X+b -6400 -5600 b. What is the y-intercept? What does it tell us? -4800 4= 5000 The umount owed 4000 -3200 2400 Ду c. Calculate the rate of change for three pairs of Ar -1600 -800 points. What do you notice? What is the meaning of Ду the in this scenario? 0.5 1, 1.5 2 2.5 3 3.5 4 4.5 5 5.5 Length of Loan (years) X Ar ($) peMo uno
Algebra and Trigonometry (6th Edition)
6th Edition
ISBN:9780134463216
Author:Robert F. Blitzer
Publisher:Robert F. Blitzer
ChapterP: Prerequisites: Fundamental Concepts Of Algebra
Section: Chapter Questions
Problem 1MCCP: In Exercises 1-25, simplify the given expression or perform the indicated operation (and simplify,...
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Question
how long does it take for your uncle to make $1000 on this deal?
what is the y- intercept? WHAT DOES IT TELL US?
and i need help with question c

Transcribed Image Text:2. Whenever you take out a loan or carry a balance on a credit card, you pay interest. The way that the interest is
calculated depends on the type of loan. Simple interest loans are loans where you pay interest only on the
amount you borrowed. Federally subsidized student loans and most car loans are simple interest loans. Credit
cards debts are in essence loans, but they are not simple interest loans because each month any unpaid interest is
added to the amount on which you pay interest. So you pay interest on your unpaid interest!
Suppose you plan to borrow $5000 from your uncle to purchase a used car. Your
uncle agrees to give you a simple interest loan at an interest rate of 8% and wants you to
repay the loan and the interest in one lump sum. The graph below shows how the amount
of time it takes you to repay the loan affects the amount you owe.
a. How long does it take for your uncle to make $1000
on this deal?
Dy x+b
8000
-7200
y=
6400
-5600
b. What is the y-intercept? What does it tell us?
4800
4=5000
The amount owed
4000
3200
-2400
Ду
c. Calculate the rate of change
for three pairs of
Ar
-1600
800
points. What do you notice? What is the meaning of
Ay
in this scenario?
the
Ar
0.5 1, 1.5 2 2.5.3 3.5.4 4.5.55.5 6
Length of Loan (years)
X.
d. Write an equation for the graph. Define your variables. How can you make sure your
equation is correct?
e. You look up simple interest formulas on the Internet and find the following formula:
A = P + Prt, where A is the amount owed, P is the principal, r is the interest rate, and t is
time or length of the loan in years. Explain how this formula relates to your equation.
HINT: Use the information given in the problem above and input it into the formula. What do you see?
Note: The simple interest formula only applies in a case where the entire amount, principal plus interest, is repaid all at once when the loan is due
(like the hypothetical situation with your uncle.) A simple interest car loan or a student loan, however, is paid back monthly over the term of the
loan. Therefore the principal owed is decreasing throughout the period over which you pay it back and so the interest you owe decreases each
month. In the end you only pay about half of the interest given by the simple interest formula.
Adapted from Los Medanos College Intermediate Algebra Class Activities
Amount Owed ($)
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