Solve.A school has just purchased new computer equipment for 
The graph shows the depreciation of the equipment over 5 years. The point (0, 21,000) represents the purchase price and the point (5, 0) represents when the equipment will be replaced. Write a linear equation in slope-intercept form that relates the value of the equipment, y, to years after purchase x . Use the equation to predict the value of the equipment after 2 years.
A. y = 21,000x + 5;
value after 2 years is $12,600.00
B. y = - 4200x + 21,000;
value after 2 years is $12,600.00;
C. y = 4200x - 21,000;
value after 2 years is $12,600.00
D. y = - 21,000x + 21,000;
value after 2 years is $-21,000.00
Answer: B
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Solve the problem.A Ferris wheel has a diameter of 400 feet and the bottom of the Ferris wheel is 13 feet above the ground. Find the equation of the wheel if the origin is placed on the ground directly below the center of the wheel, as illustrated. 
A. x2 + y2 = 40,000 B. x2 + (y - 200)2 = 160,000 C. x2 + (y - 200)2 = 40,000 D. x2 + (y - 213)2 = 40,000
Solve the equation.
- 
= 3
A. {-72} B. {72} C. {69} D. {-69}
Factor, if possible.512y9 - 729
A. (8y3 - 9)(64y6 + 81) B. (512y3 - 9)(y6 + 72y3 + 81) C. (8y3 - 9)(64y6 + 72y3 + 81) D. (8y3 + 9)(64y6 - 72y3 + 81)
Determine whether the given lines are parallel, perpendicular, or neither.y = 6x + 3y = 6x - 2
A. Perpendicular B. Parallel C. Neither