1-7. Determine Whether the graph of the equation is a circle, a point or the null set.

Exercise 1. Directions. Determine whether the graph of the equation is a circle, a point or the null set. [1 point each] 1. x3 + y = 16 2. x3+y' +5=0 3. x2 + yz + By = -16 4. x2 - 4x + y - 6y +9 = 0 5. x2 + y2 - 10x - By + 32 = 0 6. (x+5)2 + (1 - 7)? = -4 7. (x - 4)2 + (y + 3)? = 0 For numbers 8-10, find the values of & so that the graph of x + y + 8x - 12y = k+3 is [1 point each] 8. a circle 9. a point 10. a null set