Find the vertex and y-intercept of the
quadratic function.
5. y = 3x² - 12x + 40
6. y = -x² + 4x + 7
For 7 and 8, find the maximum or minimum of
the parabola.
7. y = -2x² - 16x + 20 8. y = x² + 12x - 15
9. Find the equation in standard form of the
parabola that passes through the points
(0, 6), (-3, 15), and (-6, 6).
Graph the parabola.
10. y = 3x² + 6x - 2
11. y = -2x² + 4x + 1
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