Question 840194
Compare to the general equation of a circle centered at (h,k) with radius, R.
{{{(x-h)^2+(y-k)^2=R^2}}}
a) {{{R^2=49}}},  points on the circle include (R,0), (0,R),(-R,0),(0,-R)
b) {{{R^2=1.44}}}, points on the circle include (R,0), (0,R),(-R,0),(0,-R)