It should be 78.54.
Double check that.
Formula: V=πr2h/3
r2 is R squared
Https://us-static.z-dn.net/files/d4c/b1c4613c4e210c04f4bcda5810cab46d.png
757 units squared. Here is work:
X = -2 and y = -6. your welcome :)
7 is the right answer your looking for.