Match the equation with one of the graphs below. (If necessary, use technology to render the surfaces.) HINT [See Examples 5, 6, and 7.]

f(x,y) =? square root (1?(x²+y²))

Match the equation with one of the graphs below. (If necessary, use technology to render the surfaces.) HINT [See Examples 5, 6, and 7.] f(x, y ) = - V1 -(x2 +>2) N W/ - X - O O W / - O O