Rate of Change Answers
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If y varies directly as x, and y is 180 when x is n and y is n when x is 5, what is the value of n?
A
6B
18C
30D
362
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Maria created a graph of B(t), the temperature over time. For the interval between t = 3 and t = 7, the average rate of change in her graph of B(t) is 8. Which statement must be true?
A
The temperature was 8 degrees higher when t = 7 than when t = 3.B
The temperature was 8 times higher when t = 7 than when t = 3.C
The temperature was 32 degrees higher when t = 7 than when t = 3.D
The temperature was 2 degrees higher when t = 7 than when t = 3.3
If y varies directly as x, and y is 6 when x is 72, what is the value of y when x is 8?
A
y = one-ninth
B
y = two-thirds
C
54D
964
What is the average rate of change in f(x) over the interval [4,13]?
A
One-third
B
Four-thirteenths
C
Eleven-thirteenths
D
Eleven-eighths
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