Tell whether a linear model or a quadratic model is appropriate for the data. If linear, tell whether the slope should be positive or negative. If quadratic, decide whether the leading coefficient a of x2 should be positive or negative.
A. linear; positive
B. quadratic; positive
C. quadratic; negative
D. linear; negative
Answer: C
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Use graphical methods to find values of x and y satisfying the given conditions. Find the value of the maximum or minimum.Find x ? 0 and y ? 0 such thatx + 2y ? 10 3x + y ? 10 and z = 2x + 4y is minimized.
A. Minimum of 0 when x = 0 and y = 0 B. Minimum of 20 when x = 2 and y = 4, as well as when x = 10 and y = 0, and all points in between C. Minimum of 20 when x = 2 and y = 4 D. Minimum of 20 when x = 10 and y = 0
Solve the problem.The price of a printer was reduced from $400 to $220. What was the percent of decrease?
A. 50% B. 55% C. 45% D. 81.8%
Simplify by factoring.2
A. 2
B. 23
C. 9
D. 46
Write an equation for a function whose graph fits the given description.The graph of f(x) = x2 is shifted 6 units to the left and 2 units downward.
A. y = (x - 6)2 - 2 B. y = (x + 6)2 - 2 C. y = (x + 2)2 - 6 D. y = (x - 2)2 + 6