Solve.Suppose that y varies directly as the square of x. If x is doubled, what is the effect on y?
A. y is squared.
B. y is multiplied by 4.
C. y is multiplied by 8.
D. y is multiplied by 2.
Answer: B
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Solve for the missing numbers. Markup is based on selling price. Round dollar amounts to the nearest cent.
100% S $ ?
A. 
100% S $10.71
B. 
100% S $10.71
C. 
100% S $ 4.71
D. 
100% S $10.71
Graph the quadratic function using its properties. Based on the graph determine the domain and range of the quadratic function.f(x) = -x2 + 2x + 3
A. domain: {x|-? < x < ?}
range: {y|y ? -4}
B. domain: {x|-? < x < ?}
range: {y|y ? 4}
C. domain: {x|-? < x < ?}
range: {y|y ? 4}
D. domain: {x|-? < x < ?}
range: {y|y ? -4}
Find the equation of the line passing through the indicated two points. Write the equation in point-slope form.(-2, 16) and (4, -8)
A. y + 16 = -4(x - 2) or y - 8 = -4(x + 4) B. y - 16 = -4(x + 2) or y + 8 = -4(x - 4) C. y + 16 = -4(x + 2) or y + 8 = -4(x + 4) D. y - 16 = -4(x - 2) or y - 8 = -4(x - 4)
Solve.The temperature at 2 p.m. on January 16 was -12°F. By 11 p.m. the temperature had risen 20 degrees. Find the temperature at 11 p.m.
A. -32°F B. 8°F C. 32°F D. -8°F