(-4,2) ;m=-1/3
You have to use this formula y=mx+b

  y = -1/3x +2/3

Step-by-step explanation:

We assume you want the equation of the line through the given point. The point-slope form of the equation is a good place to start.

  y -k = m(x -h) . . . . . line with slope m through point (h, k)

  y -2 = -1/3(x +4) . . . . . . fill in given values

  y = -1/3x -4/3 +2 . . . . . eliminate parentheses, add 2

  y = -1/3x +2/3 . . . . . . . simplify

80π/3 or about 83.775

step-by-step explanation:

since a cone is 1/3 of a cylinder, we need to find the base's area. since area = πr^2, we get 16π. then, multiplying this by 5, we get 80π. dividing by 3, since the cone's volume is 1/3 of that of a cylinder's, we get 80π/3.

hope this !