1. Definition: A quadratic function is the degree of 2. Can be written in this form ( y = a$x^2$ + bx + c)
graph of every quadratic function is called a parabola.

2. examples

a) function with:

b) function without:

3. desmos

a) see what happens:
graph forms a dip like thing on the graph. when you move the slider it changes in width, length and height.