You can find the symmetry line of a quadratic function using the formula 

. This video explains how to use the formula and why it’s useful.

You can find the symmetry line of a quadratic function using the formula x = -b / 2a. This video explains how to use the formula and why it’s useful. 

A number is divisible by another number if the answer does not have a remainder. Or, said another way, if the divisor is a factor of the dividend.

A symbol used to represent a number. 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 are digits. For example, 19 has two digits, 1 and 9.

Quadratic Functions

What Is the Axis of Symmetry of a Quadratic Function?