SOLUTION: Graph the quadratic equation y = x^2+ 2x

Question 313898: Graph the quadratic equation
y = x^2+ 2x
Answer by rapaljer(4671) (Show Source): You can put this solution on YOUR website!
There are several ways to graph a quadratic function like this. I'm not sure exactly how you want to do this. First, if a graphing calculator is allowed, just enter this "x^2 + 2x" in the calculator and let the calculator do it for you! Here is the algebra.com graphing calculator:

You can also graph it by just finding points.
Let x = 0, and find y. y=0^2+2*0=0
let x = 1, and find y: y=1^2 +2*1 = 3
Let x = 2, and find y: y=2^2 + 2*2=8
Let x= -1, and find y: y=(-1)^2 + 2*(-1) = 3
etc.

For additional help with graphing quadratic functions, please see my own website. Click on my tutor name "rapaljer" anywhere in algebra.com. There you will see the link to my Homepage. Near the top of my Homepage, look for the link "Math in Living Color." Choose "College Algebra", and look for "Chapter 2," "Section 2.03, Parabolas, with Graphing Calculator." In this chapter, you will find my own non-traditional explanation of the topic, complete with examples, exercises, and ALL the answers, all solved IN COLOR on these "Math in Living Color" pages.

Dr. Robert J. Rapalje, Retired
Seminole State College of Florida
Altamonte Springs Campus
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