The slope of this equation would be m = -1
Answer:
64
Step-by-step explanation:
As the angle in the bottom is shared and the 2 sides are proportional, one is 40 and 80 (times 2) and the other, 25 and 50 (times 2) so the triangles are similar so all we do is multiply 32 by 2 as its the rule. So the answer is 64.
The answer is

. You can calculate a least-squares regression by hand, but it's quite tedious, so I used the Desmos online graphing calculator. I have included the formula from the website Mathisfun to do it yourself if you are so inclined.