Answer: −0.7; for every additional hour, the length of the icicle decreases by 0.7 inches
Explanation:
It says find an interpret the slope.
Slope is also known as the rate of change.
It wants you to find how the rate of change which in this case would be how much it melts every hour.
It says it melts every 0.7 inches per hour, since it says melts it means take away so your answer is going to be a negative.
so turn 0.7 into a negative and you have your slope.
So your answer is -0.7