➕ Algebra 1 · Quadratics
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The pairs (answer key)
a < 0 ↔ The parabola opens downward
y = −2x2 + 20x − 3 ↔ Axis of symmetry x = 5
y = x2 + 3x − 10 ↔ Crosses the y-axis at (0, −10)
Vertex of y = x2 − 4x + 1 ↔ (2, −3)
y = (1/4)x2 compared with y = x2 ↔ Wider
y = −x2 + 12x − 29 ↔ Maximum value 7, at x = 6
Zeros of y = (x − 2)(x + 6) ↔ x = 2 and x = −6
Range of y = x2 + 1 ↔ All y ≥ 1