Drawing Quadratic and Cubic Graphs Math Review
math tutorials > drawing quadratic and cubic graphs
The plotting of quadratic and cubic graphs is a vast topic and can be done in various ways. The aim of this tutorial is to introduce you to the 2 types of graphs and the tabular method of drawing them (as we did for straight line graphs).
The equation for a quadratic graph can be written as
a, b, and c are constants.
y has the power of 1.
x has a maximum power of 2.
The graphs of quadratic equations are called parabolas.
These are all parabolas:
Drawing the graph
Parabola problems for you to try
Cubic graphs are in the form
a, b, c and d are constants.
y has a power of 1.
x has a maximum power of 3.
Draw the graph
Cubic graph problems for you to try
You can calculate the intercepts of parabolas and cubics in the same
way as for straight lines.
For the x-intercept, put y = 0. (A parabola may have 2 x-intercepts, a cubic 3).
For the y-intercept, put x = 0.