291 2.7 Graphing Techniques 12. Concept Check Match each equation with the sketch of its graph in A–I. (a) y = x2 + 2 (b) y = x2 - 2 (c) y = 1x + 222 (d) y = 1x - 222 (e) y = 2x2 (f) y = -x2 (g) y = 1x - 222 + 1 (h) y = 1x + 222 + 1 (i) y = 1x + 222 - 1 A. x y 0 –2 B. x y 0 2 C. x y 0 2 D. x y 0 E. x y (–2, 1) 0 F. x y 0 G. x y 0 –2 H. x y (2, 1) 0 I. x y (–2, –1) 0 13. Concept Check Match each equation with the sketch of its graph in A–I. (a) y = 2x + 3 (b) y = 2x - 3 (c) y = 2x + 3 (d) y = 32x (e) y = -2x (f) y = 2x - 3 (g) y = 2x - 3 + 2 (h) y = 2x + 3 + 2 (i) y = 2x - 3 - 2 A. x y 0 2 3 B. x y 0 6 4 C. x y 0 –2 4 D. x y 0 –1 –3 4 E. x y 0 3 5 4 F. x y 0 2 4 1 –3 (–3, 2) G. x y 0 2 1 –3 H. x y 0 2 4 3 7 (3, 2) I. x y 0 –2 3 7 (3, –2)
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