IM2 Mod2

The Vertex form of a quadratic equation is y = a(x - h) + k . Pick the option that is true about a, h and k

• If a is + it opens up and has a vertex of (k, h)
• If a is - it opens down and has a vertex at (-h, k)
• If a is + it opens down and has a vertex at (h, k)
• If a is - it opens down and has a vertex at (h, k)

What is the vertex of the parabola: y=2(x-3)²+4

• (3,4)
• (-3,4)
• (3, -4)
• (-3,-4)

Which function represents a parabola that opens downward and intersects the
x-axis at (-2, 0) and (5,0)?

• f(x) = -10(x + 5)(x – 2)
• f(x) = -2x² + 5
• f(x) = 5(x + 5)(x – 2)
• f(x) = -2(x + 2)(x – 5)

Choose the function that
represents the graph

• f(x) = 2(x -3)² - 4
• f(x) = x² + 4x + 3
• f(x) = 6(x -4)² - 3
• f(x) = 1/2(x + 3)² - 4

What point is the maximum value of a parabola represented by the equation f(x) = -2x²  +12x + 5?

• (3,23)
• (1,3)
• (3,0)
• (5,6)