Test # 3: Writing Quadratic Functions & Equations of Parabola

What is the standard form of a quadratic?

• y = ax² + bx + c

• y = a(x - h)² + k

• y = mx + b

• y = (x - h)(x - k)

What is the vertex form a quadratic?

• y = ax² + bx + c

• y = a(x - h)² + k

• y = mx + b

• y = (x - h)(x - k)

If the a value is positive, which direction does the graph open?

• up
• down
• left
• right

If the a value is negative, which direction does the parabola open?

• up
• down
• left
• right

What is the green dashed line called?

• roots or x-intercepts
• parabola
• axis of symmetry
• line of dashes

The axis of symmetry line passes through which point?

• y-intercept
• any random point
• vertex
• symmetrical point for the vertex

What is the vertex form of the given graph?

Write the equation of the quadratic function that has a vertex of (-5, 9) and passes through the point (-7, -15).

• y = 6(x + 5)² + 9
• y = -6(x - 5)² + 9
• y = 6(x - 5)² + 9
• y = -6(x + 5)² + 9

Find the equation of the parabola with a vertex at (2, -3) and a focus at (2, -5).