We can use the slope formula:

By plugging the values into this formula, we can solve for the slope.
-1 - 4 / -8 - 0
-5 / -8
Because there are two negatives, they cancel out;
The slope is 5/8
1.09 that's the answer ! I just wrote extra stuff for the sake of it . x= 1.09
that's the solution ^
the answer is: 847.98 m^2
64 - 9 = 55 \sqrt{55} = 7.4161984871
7.4161984871/2 ≈3.7