Vertex form

Front

What does the h term tell you in vertex form?

Back

The h term indicates the horizontal shift of the parabola. It tells you the direction (left or right) and is the x-value of the vertex, but in the opposite sign. It also represents the axis of symmetry.

Front

Back

Vertex: (-1, -1)

Front

Back

Narrow

Front

What does the k term tell you in vertex form?

Back

The k term indicates the vertical shift of the parabola. It tells you the direction (up or down) and is the y-value of the vertex.

Front

Back

Left: 1, Down: 4

Front

What is the vertex form of a quadratic equation?

Back

Front

How does the value of 'a' affect the graph of a parabola in vertex form?

Back

The value of 'a' determines the direction of the parabola (upward if a > 0, downward if a < 0) and its width (narrower if |a| > 1, wider if |a| < 1).

Front

What is the axis of symmetry in vertex form?

Back

Front

How do you find the y-intercept from the vertex form?

Back

Front

What does it mean if a parabola is 'narrow'?

Back

A 'narrow' parabola means it is stretched vertically, which occurs when the absolute value of 'a' is greater than 1.