
Concept explainers
Monthly Payment for a Home: If you borrow $120,000 at an APR of 6% in order to buy a home, and if the lending institution compounds interest continuously, then your monthly payment
a. Make a graph of M versus Y. in choosing a graphing window, you should note that a home mortgage rarely extends beyond 30 years.
b. Express in functional notation your monthly payment if you pay off the loan in 20 years, and then use the graph to find that value.
c. Use the graph to find your monthly payment if you pay off the loan in 30 years.
d. From part b to part c of this exercise, you increased the debt period by 50%. Did this decrease your monthly payment by 50%?
e. Is the graph concave up or concave down?
Explain your answer in practical terms.
f. Calculate the average decreases per year in your monthly payment from a loan period of 25 to a loan period of 30 years.

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Chapter 2 Solutions
Functions and Change: A Modeling Approach to College Algebra (MindTap Course List)
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- 2. A microwave manufacturing firm has determined that their profit function is P(x)=-0.0014x+0.3x²+6x-355 , where is the number of microwaves sold annually. a. Graph the profit function using a calculator. b. Determine a reasonable viewing window for the function. c. Approximate all of the zeros of the function using the CALC menu of your calculator. d. What must be the range of microwaves sold in order for the firm to profit?arrow_forwardA clothing manufacturer's profitability can be modeled by p (x)=-x4 + 40x² - 144, where .x is the number of items sold in thousands and p (x) is the company's profit in thousands of dollars. a. Sketch the function on your calculator and describe the end behavior. b. Determine the zeros of the function. c. Between what two values should the company sell in order to be profitable? d. Explain why only two of the zeros are considered in part c.arrow_forwardCCSS REASONING The number of subscribers using pagers in the United States can be modeled by f(x) = 0.015x4 -0.44x³ +3.46x² - 2.7x+9.68 where x is the number of years after 1990 and f(x) is the number of subscribers in millions. a. Graph the function. b. Describe the end behavior of the graph. c. What does the end behavior suggest about the number of pager subscribers? d. Will this trend continue indefinitely? Explain your reasoning.arrow_forward
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