d. If f(x) is reflected over the x-axis, moved 7 units to the right, and 4 units down, what is the new equation?

If x varies directly as y, and x=21 when y=7, find x when y=9.

nd fill in the coefficients for the regression equation: Y= _+ X1+ X2

Jane collects data from 40 elementary school students and finds that the relationship between age (x) and score on a certain test (y) is given by y=3.2x+45. What can she extrapolate about the score a 16-year old will get on the test?