Question

If the points (-4, 1) and (2, 1) are the endpoints of a diameter of a circle, where is the center?

Answer 1

To find this we evaluate using the midpoint formula:

m=($\frac{x_{1}+ x_{2} }{2}$, $\frac{ y_{1}+ y_{2} }{2}$)
m=($\frac{-4+2}{2}$, $\frac{1+1}{2}$)
m=(-1,1)
The answer is B) (-1,1)

Answer 2

Using the midpoint formula, you'd get B: -1,1
: D