SOLUTION: http://www.algebra.com/tutors/students/your-answer.mpl?question=969032. TO edwin. Can you redo the redo the whole website without mistake for me. Because i think there is somethin

Algebra ->  Graphs -> SOLUTION: http://www.algebra.com/tutors/students/your-answer.mpl?question=969032. TO edwin. Can you redo the redo the whole website without mistake for me. Because i think there is somethin      Log On


   

Question 969035: http://www.algebra.com/tutors/students/your-answer.mpl?question=969032. TO edwin.
Can you redo the redo the whole website without mistake for me. Because i think there is something wrong in the last papragraph.
you typed So that can only be where the y-axis has positive numbers
marked on it, which is above the x-axis.
So, i think there is something missing after so that?
pls redo the website for me
thx
Answer by MathLover1(20849) About Me  (Show Source):
You can put this solution on YOUR website!

if y=ax%5E2%2Bbx%2Bc%3E0 , then the graph must be above the x-axis because, no matter what value you take for x, you will have y%3E0
you already know that y-axis has positive values above the origin, or above the x-axis
one example is:y=5x%5E2%2Bx%2B1
check some x values:
x|y
-3|43...y=5%28-3%29%5E2%2B%28-3%29%2B1=5%2A9-3%2B1=43
-1|5...y=5%28-1%29%5E2%2B%28-1%29%2B1=5%2A1-1%2B1=5
0|1...y=5%280%29%5E2%2B%280%29%2B1=0%2B0%2B1=1
1|7...y=5%281%29%5E2%2B%281%29%2B1=5%2A1%2B1%2B1=7
as you can see y is always positive value
here is the graph:
+graph%28+600%2C+600%2C+-10%2C+10%2C+-10%2C+10%2C+5x%5E2%2Bx%2B1%29+