Find the equation of the tangent line at the given point on the curve.xy2 = 12; (3, -2)
A. y = 
x + 3
B. y = - 
x + 3
C. y = - 
x - 3
D. y = 
x - 3
Answer: D
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Find the equation of the line passing through the indicated two points. Write the equation in point-slope form.(-2, 15) and (4, -9)
A. y + 15 = -4(x - 2) or y - 9 = -4(x + 4) B. y - 15 = -4(x + 2) or y + 9 = -4(x - 4) C. y - 15 = -4(x - 2) or y - 9 = -4(x - 4) D. y + 15 = -4(x + 2) or y + 9 = -4(x + 4)
Solve the problem.A balloon is secured to rope that is staked to the ground. A breeze blows the balloon so that the rope is taut while the balloon is directly above a flag pole that is 30 feet from where the rope is staked down. Find the altitude of the balloon if the rope is 80 feet long.
A. 10
ft
B. 5
ft
C. 10
ft
D. 5
ft
Use the distributive property. Assume that variables represent nonnegative values.
(9 + 
)
A. 7
+ 9
B. 9
- 7
C. 9
+ 7
D. 10
The table below gives the height and weight of four randomly selected University undergraduate women. What is the least squares error E for these data points? 
A. E = (150A + B - 60)2 + (155A + B - 55)2 + (165A + B - 70)2 + (170A + B - 62)2 B. E = 150(A + B - 60)2 + 155(A + B - 55)2 + 165(A + B - 70)2 + 170(A + B - 62)2 C. E = (150A - 60B)2 + (155A - 55B)2 + (165A - 70B)2 + (170A - 62B)2 D. E = (150A + 60B)2 + (155A + 55B)2 + (165A + 70B)2 + (170A + 62B)2 E. none of these