Solve the problem.Find the least squares line through the points 
and 
A. y = -9x - 12
B. y = 5x - 16
C. y = -9x - 16
D. y = 5x - 12
Answer: D
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Find the equation of the normal line to the given surface at the specified point.
 figures 4.png)
Solve the problem.The intensity I of light varies inversely as the square of the distance D from the source. If the intensity of illumination on a screen 5 feet from a light is 4 foot candles, find the intensity on a screen 20 feet from the light.
A. 
foot-candles
B. 1
foot-candles
C. 
foot-candles
D. 2 foot-candles
Find the domain of the function.f(x) = x2 + 8
A. all real numbers B. {x|x > -8} C. {x|x ? -8} D. {x|x ? -8}
Use a graphing calculator and the method of matrix inverses to solve the system. Give 5 decimal places.?x + ey + 
z = 2ex + ?y + 
z = 4
x + ey + ?z = 6
A. {(-2.01284, 2.71182, 0.67317)} B. {(1.41421, 2.82843, 3.46410)} C. {(-2.71828, 3.14159, 1.41421)} D. {(-4.12755, 4.84931, -0.01039)}