Find the product.7x(x + 8)(x - 2)
A. 7x2 + 42x - 112
B. 7x3 + 112x2 - 112x
C. 7x3 + 42x2 - 112x
D. 7x3 + 70x2 - 112x
Answer: C
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?What does the line of best fit not tell you about data that is strongly correlated?
A. ?It gives you a tool to predict y values for given x values. B. ?It is a predictive tool for your data set. C. ?It gives you y values in your data set for given x values. D. ?The distance between each point, on both sides of the line, and the line of fit equals 0. E. The line of fit is a straight line with a slope and y-intercep?t.
Identify the equation as a parabola, circle, ellipse, or hyperbola.7y = 4(x + 8)2
A. Parabola B. Ellipse C. Circle D. Hyperbola
Solve the problem.The graph shows the hours studied and the exam grades obtained on a finite math exam for 8 students. (The two points on the line do not represent any of the eight students.) The line of best fit, the line graphed on the coordinate system, can be used to approximate the test grade the average student receives for the number of hours they study. 
Find the equation of the line of best fit. Then use the equation to estimate the number of hours studied by a student who received a grade of 78 . Round to two decimal places.
A. 4.71 hr B. 4.24 hr C. 2.23 hr D. 3.21 hr
The function f is one-to-one. Find its inverse.f(x) = 5x2 - 7, x ? 0
A. f-1(x) = 
B. f-1(x) = 
C. f-1(x) = 
D. f-1(x) = - 