Write an equation to describe the situation.Each week you save 
, which is 
of your weekly income. Write an equation to describe your weekly income I.
A. 
= 72
B. 
= 
C. I + 
= 72
D. 6I = 72
Answer: A
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Provide an appropriate response.Which quantity describes how widely data values are spread about the center of a distribution?
A. Skewness B. Mean C. Variation D. Number of peaks
Solve the problem.Fireworks are launched into the air. The quadratic function 
models the fireworks' height, y, in feet, x seconds after they are launched. When should the fireworks explode so that they go off at the greatest height? What is that height? (Round answers the nearest hundredth.)
A. -6.22 sec, 612.77 ft B. 6.22 sec, 624.77 ft C. 6 sec, 199 ft D. 1104 sec, 6 ft
Given the values of x and y, find an equation of variation in which y varies directly as x.y = 28, when x = 8
A. y = 3.5y B. y = 0.29x C. y = 28x D. y = 3.5x
Solve by graphing.Suppose the sales of a particular brand of appliance satisfy the relationship 
where y represents the number of sales in year x, with 
corresponding to 1982. Find the number of sales 
. 
A. 7950 B. 8060 C. 4030 D. 3920