Which rule describes a linear relation?

a. double x and subtract five to get y.
b. multiply x and y to get 20.
c. multiply x times itself and add five to get y.
d. divide 40 by x to get y.

Use multiples to write two fractions equivalent to 7/9. 14/18, 8/10 6/8, 21/27 10/12, 28/36 14/18, 21/27

The position of a moving particle is given by the position function: f(t)=-9t-t^2-0.2t^3+0.1t^4 0 a. at what time does the particle reverse direction? b. when is the displacement positive? (round one decimal place and answer in interval notation) c. when is the displacement negative? (round one decimal place and answer in interval notation) d. when is the particle’s acceleration positive? (round one decimal place and answer in interval notation) e. when is the particle’s acceleration negative? (round one decimal place and answer in interval notation)

Mackenzie needs to determine whether the rectangles are proportional. which process could she use? check all that apply.