How do you graph quadratic functions

you can plug it into a graphing calcuator right? or no

Step-by-step explanation:

Let's go:

First: You must find the function roots. Function roots are values of y or f(x) when x equals zero.

After this, you use some values of x for find values of y.

And finally, you make the grafic with values founded.

I hope I helped you.

the one below it is a function

2y+y=5

add 2y and y