Question

The center of a circle is (-2, -3) and the radius is 4. Which point does NOT lie on the circle?

a. (-2, -7)

b. (-2, 1)

c. (-6, -3)

d. (-2, 7)

Answer 1

If you were to use the equation for the circle (x-h)^2+(x-k)^2=r^2 your circle would be (x+2)^2+(y+3)^2=16. Plotting your points on the graph, you will see that the only point that isn't on the circle is:

d) (-2,7).