Step to draw a Graph of a Quadratic Function

Hello students.

Today we will learn how to make a graph of a quadratic function. Are you ready?

1st step
*) We should find the intersection points of x-axis and y-axis. We can find the intersection of x-axis if y = 0. And  we can find the intersection of y-axis if x = 0.

2nd step
*) This step will help us to find the minimum or the maximum point of a quadratic function. If we want to find the point, we can use (x,y) = ( b/2a , D/-4a ). Did you know what is variable D? This variable represent determinant. We could find determinant by the root of b square-4ac..

3rd step
*) After we find all points, draw the points into a Cartesian diagram and then, we have to make a line that connect each point that we find.

This is the manual step to draw a graph of a quadratic function. If we want to draw a graph using software, such as geogebra or maple. We only type our quadratic function into the command column, and after that the software will show us how the graph of the quadratic function.

Thank you.


Dyah Ayu Setyani
B4/ 2010110037