Graphing Equations In Slope-Intercept Form Worksheet With Answer Key Page 3
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3b. The cost per month to maintain the membership.
b. y = −3x + 80; y represents the temperature, x
represents the elapsed time, the slope represents the
c. The start up fee
change in temperature per minute and the y-intercept
4-1 Graphing Equations in Slope-Intercept Form
represents the temperature when the temperature
d. $1225
started to drop.
59. FITNESS Refer to the information given.
60. MAGAZINES A teen magazine began with a
circulation of 500,000 in its first year. Since then, the
circulation has increased an average of 33,388 per
year.
a. Write an equation that represents the circulation c
after t years.
b. What does the slope represent?
a. Write an equation that represents the cost C of a
membership for m months.
c. What does the c-intercept represent?
b. What does the slope represent?
d. If the magazine began in 1944, and this trend
continues, in what year will the circulation reach
c. What does the C-intercept represent?
3,000,000?
ANSWER:
d. What is the cost of a two-year membership?
a. c = 33,388y + 500,000
ANSWER:
a. C = 45m + 145
b. t he increase in circulation each year
b. The cost per month to maintain the membership.
c. the circulation in the first year
c. The start up fee
d. 2019
61. SMART PHONES A telecommunications company
d. $1225
sold 3305 smart phones in the first year of
production. Suppose, on average, they expect to sell
60. MAGAZINES A teen magazine began with a
25 phones per day.
circulation of 500,000 in its first year. Since then, the
circulation has increased an average of 33,388 per
a. Write an equation for the number of smart phones
year.
P sold t years after the first year of production,
assuming 365 days per year.
a. Write an equation that represents the circulation c
after t years.
b. If sales continue at this rate, how many years will
it take for the company to sell 100,000 phones?
b. What does the slope represent?
ANSWER:
c. What does the c-intercept represent?
a. P = 9125t + 3305
d. If the magazine began in 1944, and this trend
b. 12 yr
continues, in what year will the circulation reach
3,000,000?
ANSWER:
a. c = 33,388y + 500,000
b. t he increase in circulation each year
c. the circulation in the first year
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Page 3
d. 2019
61. SMART PHONES A telecommunications company
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