The equation to find percent error is:
percent error=(experimental-theoretical)/theoretical *100
So, (115-82.5)/82.5=0.393939*100
39.3939%, or 39.94%
Hope this helps!!
The first two is wrong, the last two is one of the right ones, I think it’s c
30% decrease
175 divided by 250 = 0.7
1 - 0.7 = 0.3
0.3 = 30%
You would select the points with the x-values -3 and 2 and use the slope formula:
(-3, -36) and (2,4)

← slope formula
x1 = -3 y1 = -36 and x2 = 2 y2 = 4
The answer is E hope this helps