Quadratics: Vertex, Intercept, Factor by Graphing

The graphed function is

• y = 2(x + 3)² + 5

• y = 2(x + 5)² - 3

• y = -2(x - 3)² + 5

• y = 1/2 (x + 3)² + 5

The graphed function is

• y = 3(x - 2)² - 5

• y = $\frac{1}{3}$ (x + 4)(x - 3)

• y = - $\frac{1}{3}$ (x + 4)(x - 3)

• y = $\frac{1}{3}$ (x - 4)(x + 3)

The zeros (x-intercepts) of a quadratic function are (-5,0) and (7,0). Which is the only possible function?

• y = -17(x + 5)(x - 7)

• y = 2(x - 5)(x + 7)

• y = 2(x + 5)² + 7

• y = 2(x - 7)² + 5

The vertex of a quadratic function is (-3, 5). Which of the following could be the function

• y = (x - 5)² - 3

• y = 2(x + 3)² + 5

• y = -(x + 3)(x - 5)

• y = -(x - 3)(x + 5)

The zeros of the function are shown. What is the vertex?

• (4, 3)

• (2, -9/2)

• (2, 5/ 2)

• (2, 9/2)

Interval of x where y is decreasing is

• 3 < x < $\infty$

• 5 < x < $-\infty$

• $-\infty$ < x < 3

• $-\infty$ < x < $\infty$