Convert the polar equation to a rectangular equation. Then determine the graph's slope and y-intercept.r cos 
= 1
A. y = x
+ 2; slope: 
; y-intercept: 2
B. y = -x
- 2; slope: -
; y-intercept: -2
C. y = -x
+ 2; slope: -
; y-intercept: 2
D. y = x
- 2; slope: 
; y-intercept: -2
Answer: D
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Determine whether the two given lines are parallel. 3x - 4y = 1 8x + 6y = 1
A. Yes B. No
Use the following table to convert the temperature numerically. If there are two choices, use the higher value. 
100.5°F
A. 38.1°C B. 37.9°C C. 100.5°F D. 100.2°F
Find a formula for the inverse of the function described below.32° Fahrenheit = 0° Celsius. A function that converts temperatures in Celsius to those in Fahrenheit is 
.
A. f-1(x) = 
x + 32
B. f-1(x) = x + 32
C. f-1(x) = 
(x - 32)
D. f-1(x) = 
(x + 32)
Solve the problem.When making a telephone call using a calling card, a call lasting 6 minutes cost $2.80. A call lasting 13 minutes cost $5.60. Let f(x) be the cost of making a call lasting x minutes using a calling card. Write a linear function that models the cost of making a call lasting x minutes.
A. f(x) = 0.4x + 0.4
B. f(x) = -0.4x + 5.2
C. f(x) = 
x - 
D. f(x) = 0.4x - 7.4