Question

How do you find the line of symmetry without graphing?

Answer 1

`x=-b/(2a)`

Explanation:

Assuming you mean line of symmetry for quadratic functions in the form `ax^2 + bx + c` it will be at `x` = vertex where vertex = `-b/(2a)`

Another way to find the same thing is find the midpoint between any two x-values that have the same y-value.