Question

Solve for the coefficient a in vertex form for the parabola in Daredevil Danny’s practice jump

Answer 1

• -8/25 or -0.32

Explanation:

• Vertex is (25, 32)

The function in vertex form:

• y = a(x - 25)² + 32

x- intercepts are 15 and 35:

• 0 = a(15 - 25)² + 32 or 0 = a(35 - 25)² + 32
• 0 = a*100 + 32
• 100a = - 32
• a = -32/100
• a = -8/25 or -0.32