42. A circle in the standard (x, y) coordinate plane has center (7, -6) and radius 10 coordinate units. Which of the following is an equation of the circle?

Answer and Explanation

Your Answer is

Correct Answer is J

Explanation

The center of the circle (a,b) and the radius r are known, then the analytical formula of the circle is (xa)2+(yb)2=r2 Substituting a=7, b=-6, r=10 into the formula is (x-7)2+(y+6)2=100 Therefore choose J