Provide an appropriate response.The total number of reported cases of AIDS in the United States has risen from 372 in 1981 to 100,000 in 1989 and 200,000 in 1992. Does a linear equation fit this data? Explain.
What will be an ideal response?
No, the data cannot be modeled by a linear equation because the reported cases are not increasing at a constant rate. Assume a linear equation, and examine the slope of the two line segments. The slope of the segment from (0, 372) to (8, 100,000) is 12,453.5 while the slope of the segment from 
to 
is 33,333.
.(Explanations will vary.)
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Find the indicated root, or state that the expression is not a real number.
A. - 
B. -1
C. not a real number
D. 1
Find the center of the hyperbola.
- 
= 1
A. (5, -4) B. (-5, 4) C. (-4, 5) D. (0, 5)
Find an equation of a parabola satisfying the given conditions.Focus at (8, 3), directrix y = -1
A. (x - 3)2 = 8(y - 1) B. (x - 8)2 = 8(y - 3) C. (y - 3)2 = 8(x - 8) D. (x - 8)2 = 8(y - 1)
Find the mean. Round to the nearest tenth when necessary.The numbers of miles John ran over the last six days were as follows: 4, 6, 10, 5, 11, 10
A. Mean = 7.7 miles B. Mean = 9.2 miles C. Mean = 8.2 miles D. Mean = 6.2 miles