1. What is the equation of the circle in standard form? a. (x+1)2 – y+k)2 = r2 c. (x-h )2 + (y-k)2 = r2 b. (x-h)2 = (y-k)2 = r2 2. Which of the following equation of the circle has the center of (0,0)? d. (y-h)2 + (h-k)2 = r2 a. x2 - y2 = 2r b. x2 + y2 = 2r c. x2- y2 = r2 d. x2 + y2 = r2 3. Given center (-5, 3) and a radius of 12 units, what is the equation of the circle in a standard form? a. (x-5)2 + (y+3)2= 144 b. (x+5)2 + (y-3)2=144 c. (x-5)2 - (y+3)2= 144 d. (x-5)2 + (y-3)2= 144 4. What is the center and the radius of the circle x2 + y2 -6x -10y + 18= 0? a. C(-3,5); r=9 b. C(-3,-5); r=4 c. C(3,5); r=-4 d. C(3,5); r=4 5. What is the general equation of the circle given the center at (-2,5) and a radius of 4 units? b. x2 + y2 - 4x -10y + 13=0 a. x2 + y2 - 4x + 10y -13=0 d. x2 + y2 + 4x +10y + 13=0 c.x2 + y2 + 4x - 10y +13=0
