The line graph shows the recorded hourly temperatures in degrees Fahrenheit at an airport. 
At what time was the temperature 79°?
A. 4 p.m.
B. 1 p.m.
C. 12 p.m.
D. 3 p.m.
Answer: B
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Solve by graphing.y = -2 - 2x 5x + 3y = -4
A. (2, 2) B. (0, -2) C. (-2, -3) D. (-2, 2)
Find the specified domain.For f(x) = 7x - 7 and g(x) = 8x + 6, what is the domain of f ? g?
A. [0, ?) B. (-?, 0) C. (0, ?) D. (-?, ?)
Express the terminating decimal number as a quotient of two integers.12.75
A. 12
B. 
C. 
D. 
Solve the problem.A piece of land is shaped like a right triangle. Two people start at the right angle of the triangle at the same time, and walk at the same speed along different legs of the triangle. If the area formed by the positions of the two people and their starting point (the right angle) is changing at 
then how fast are the people moving when they are 
from the right angle? (Round your answer to two decimal places.)
A. 1.33 m/s B. 4.50 m/s C. 0.67 m/s D. 0.33 m/s