Consider the equation of change 
. What can you say about the graph of f versus x when 
?
?
A. The graph is increasing.
B. The graph is decreasing.
C. The graph reaches a maximum.
D. The graph reaches a minimum.
Answer: A
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Use least common multiple or greatest common divisor to solve the problem.Three taxi cabs make a complete trip from downtown to the airport and back in 10, 26 and 65 minutes, respectively. If all three cabs leave at the same time, what is the shortest time that must pass before they are all together again?
A. 260 minutes B. 1690 minutes C. 101 minutes D. 130 minutes
Provide an appropriate response.A linear model is obtained for the following set of data. 
For what range of x-values would it be reasonable to use the model to predict the y-value corresponding to a given x-value? Why?
What will be an ideal response?
The graph shows the total sales in thousand of dollars from the distribution of x thousand catalogs. Find the average rate of change of sales with respect to the number of catalogs distributed for the change in x.
40 to 50
A. 10 B. 5 C. 1 D. 2
Find all indicated roots. Write your answer in the specified form.Cube roots of 1; rectangular form
A. -1, 1
B. 1, - 
+ 
i, - 
- 
i
C. 1, 
- 
i, - 
- 
i
D. 1, 
+ 
i, - 
+ 
i