Linear Equation Worksheet Page 6
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74. Suppose a 5-minute overseas call costs $5.91 and a 10-minute call costs
$10.86. The cost of the call and the length of the call are related.
a. Identify the variables in this situation.
i. x =
ii. f(x) =
b. What is the given information in the problem? (find all that apply)
i. y-intercept:
ii. Slope:
iii. One point:
iv. Second point:
c. Write an equation for this situation.
d. Use your equation to find out how long you can talk on the phone for
$12.
e. What is the domain?
A. Eisenman
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