Select all that apply.

which of the following are equivalent?

0.4
40%
4%
2/5

4% is not equivalent to 40%
0.4 is equivalent to 40%.  Just move the decimal two places to the right.
2/5 is equivalent to 0.4,  which in turn is equivalent to 40%.  2 divided by 5=0.4
The answers are all but 4%

the formula of a slope:

we have the points (-2, 7) and (2, 3). substitute:

answer: the slope is equal -1.