# How do you identify the important parts of #y = x^2 – 2x# to graph it?

##### 1 Answer

We can write your function in the general form:

#### Explanation:

Basically, to graph your function (that is a Quadratic, representing a Parabola) you need to observe:

1) the coefficient

If it is

2) the vertex: this is the highest/lowest point reached by your parabola and the parabola is plotted all around it. The coordinates of this special point are given as:

So vertex

3) y-intercept. You can set

4) x-intercept(s) (when they exist). You set

and:

So x-intercepts at

You can now plot your parabola using mainly these points: