Question

If the radius of the circle is decreased without changing the coordinates of the center point, how are the coefficients C, D, and E affected?

Answer 1

Hint: E is the radius. What happens to the radius? Also, C & D affect the center point. Does the center point change?

Answer 2

so everything would go unchanged?

Answer 3

'If the radius of the circle is decreased without changing the coordinates of the center point'

does the radius remain unchanged?

Answer 4

no

Answer 5

E is the r^2 term. If r only is decreased, what happens to E?

Answer 6

re-write as (x-a)^2 + (y-b)^2 = r^2

then square these can compare against the coefficients given.

this is a circle of radius r centered at (a,b)

Answer 7

i am absolutely clueless