Perform the indicated operations and express your answer in the form a + bi. 
A. 6i
B. ±6
C. -6i
D. i
Answer: A
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Use the graph to answer the question.Find the horizontal and vertical asymptotes of the rational function graphed below.
A. Horizontal: y = ±3; vertical: x = -2 B. Horizontal: y = 0; vertical: x = ±3 C. Horizontal: y = -2; vertical: x = ±3 D. Horizontal: none; vertical: x = ±3
Match the equation of the ellipse with the appropriate description.
= 1 - 
A. x-intercepts (9, 0), (-9, 0); y-intercepts (0, 25), (0, -25) B. x-intercepts (3, 0), (-3, 0); y-intercepts (0, 5), (0, -5) C. x-intercepts (5, 0), (-5, 0); y-intercepts (0, 3), (0, -3) D. x-intercepts (25, 0), (-25, 0); y-intercepts (0, 9), (0, -9)
Identify the slope and y-intercept of the line with the given equation.f(x) = -7x - 4
A. Slope -7, y-intercept (0, -4) B. Slope -4, y-intercept (0, -7) C. Slope -4, y-intercept (0, 7) D. Slope 7, y-intercept (0, -4)
Find the least-squares line for the data points (a - 1, b), (a, b + c + 1), and 
What will be an ideal response?