On a certain day the temperature changed at a rate of -2 per hour how long did it take for the change in temperature to be -14

Let us divide -14 by the degrees of -2 change. This yields 7 which means there were 7 intervals of a hour each it took to reach -14 degrees, assuming the starting temperature was 0. Your answer should be 7, hope this helps!

Here are the answers to the ones that i could see.