Sketch the graph of each quadratic function and compare it with the graph of y = x2.
1. (a) f (x) = 2x2
(b) g (x) = −2x2
(c) h (x) = x2 + 2
(d) k (x) = (x + 2)2
2. (a) f (x) = x2 − 4
(b) g (x) = 4 − x2
(c) h (x) = (x − 5)2 + 3
(d) k (x) = ½x2 - 1