Determine the rectangular equation of the curve whose parametric equations are given.x = 2t, y = t + 4; -2 ? t ? 3
A. y = 
x + 4; -4 ? x ? 6
B. y = 
x - 4; -? < x < ?
C. y = x2 + 1; -2 ? x ? 2
D. y = -2x + 4; -? < x < ?
Answer: A
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Solve.The difference of a number and 8 is 46 less the number. Find the number.
A. 19 B. 27 C. -27 D. -19
Find the slope of the line.
A. 2
B. - 
C. -2
D. 
Provide an appropriate response.The bar graph shows the median, or middlemost, household income for African-Americans and Hispanics for three selected years in a certain state.
a) The formula I = 31,509 + 1789x - 106x2 models the median income of African-Americans, I, x years after 1990. Use the formula to find the median income for African-Americans in 2000.b) Does the value given by the mathematical model in part (a) underestimate or overestimate the actual median income for African-Americans shown by the bar graph. By how much?a) The formula I = 35,011 + 1859x - 112x2 models the median income of Hispanics, I, x years after 1990. Does the model
underestimate or overestimate the median income for Hispanics in 2016. By how much? What will be an ideal response?
Find the intercepts, and then graph the line.2x - 3y = 18
A. (0, -6), (-9, 0)
B. (0, -6), (9, 0)
C. (0, -9), (6, 0)
D. (0, 6), (9, 0)