Determine the vertex of the function f(x) = −4(x − 3)2 6. (6, −3) (6, 3) (3, 6) (−3, 6)

How do refracting telescopes magnify a far away image? a. by directing light beams to meet at a focal point b. by absorbing light beams’ wavelengths c. by forcing light beams to change direction d. by measuring light beams’ velocity