Equations Worksheet With Answers Page 5
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652. {(1, 9), (13, 26), (–3, 4), (–11, –2)}
ANSWER:
ANSWER:
Study Guide and Review - Chapter 4
Positive; as the number of hours spent studying
{(9, 1), (26, 13), (4, −3), (−2, −11)}
increases, the test scores increase.
48. ATTENDANCE A scatter plot of data compares
the number of years since a business has opened and
its annual number of sales. It contains the ordered
pairs (2, 650) and (5, 1280). Write an equation in
slope-intercept form for the line of fit for this
situation.
ANSWER:
53.
y = 210x + 230
ANSWER:
49. SALE The table shows the number of purchases
{(2.7, −4), (3.8, −1), (4.1, 0), (7.2, 3)}
made at an outerwear store during a sale. Write an
equation of the regression line. Then estimate the
number of sales on day 10 of the sale.
ANSWER:
54.
y = 5.36x + 11; 65
ANSWER:
{(4, −12), (0, −8), (−4, −4), (−8, 0)}
50. MOVIES The table shows ticket sales at a certain
theater during the first week after a movie opened.
Find the inverse of each function
Write an equation of the regression line. Then
estimate the daily ticket sales on the 15th day.
55.
ANSWER:
56. f (x) = 3x + 8
ANSWER:
ANSWER:
y = −5.79x + 99.14; $12.29
Find the inverse of each relation.
51. {(7, 3.5), (6.2, 8), (–4, 2.7), (–12, 1.4)}
57.
ANSWER:
ANSWER:
{(3.5, 7), (8, 6.2), (2.7, −4), (1.4, −12)}
52. {(1, 9), (13, 26), (–3, 4), (–11, –2)}
58.
ANSWER:
{(9, 1), (26, 13), (4, −3), (−2, −11)}
ANSWER:
59.
ANSWER:
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Page 5
53.
60.
ANSWER:
ANSWER:
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