Find the equation of the least-squares regression line. Graph the line and data points on the same graph.
A. y = 70.4 - 6.2x
B. y = 90.0 - 5.0x
C. y = 40.0 - 6.25x
D. y = 100.4 - 6.2x
Answer: A
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Match the equation with the surface it defines.x2 + y2 = 9 
A. Figure 3 B. Figure 4 C. Figure 2 D. Figure 1
Solve the problem.To find the height of this tree, Luis marked the tree at eye level, 1.8 meters above the ground. He measured 
from the base of the tree and then held a 
ruler vertically in front of his eye until the ruler just obscured the tree above the mark. Using a string tied through a hole in one end of the ruler, Luis found that the distance from his eye to the ruler was 5.1 centimeters. What was the height of the tree? Round to the nearest meter.
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A. 30 m
B. 40 m
C. 34 m
D. 36 m
Sketch the vector field in the plane along with its horizontal and vertical components at a representative assortment of points on the circle x2 + y2 = 4.F = -xi - yj
What will be an ideal response?
Use the intermediate value theorem for polynomials to show that the polynomial function has a real zero between the numbers given.f(x) = 2x3 - 7x2 + 4x + 8; -1 and 0
A. f(-1) = -4 and f(0) = 9 B. f(-1) = -5 and f(0) = 8 C. f(-1) = 5 and f(0) = 8 D. f(-1) = 5 and f(0) = -8