SOLUTION: Can someone please help me I seem to not be able to find the corresponding y values for x=-4,-3,-2,-1,0,1,2 if y=x^2+2x-15. Also can you show me how it is graphed. Thank you

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Question 150470This question is from textbook
: Can someone please help me I seem to not be able to find the corresponding y values for x=-4,-3,-2,-1,0,1,2 if y=x^2+2x-15. Also can you show me how it is graphed. Thank you This question is from textbook

Answer by jim_thompson5910(35256)   (Show Source): You can put this solution on YOUR website!

Table of Contents:


Jump to Table
Jump to Graph


In order to graph , we need to plot some points.


Let's find y when



Start with the given equation.


Plug in .


Square to get .


Multiply and to get .


Multiply and to get .


Combine like terms.


So when , then .


So we have the point .


----------------------------------------------------


Let's find y when :


Start with the given equation.


Plug in .


Square to get .


Multiply and to get .


Multiply and to get .


Combine like terms.


So when , then .


So we have the point .


----------------------------------------------------


Let's find y when :


Start with the given equation.


Plug in .


Square to get .


Multiply and to get .


Multiply and to get .


Combine like terms.


So when , then .


So we have the point .


----------------------------------------------------


Let's find y when :


Start with the given equation.


Plug in .


Square to get .


Multiply and to get .


Multiply and to get .


Combine like terms.


So when , then .


So we have the point .


----------------------------------------------------


Let's find y when :


Start with the given equation.


Plug in .


Square to get .


Multiply and to get .


Multiply and to get .


Combine like terms.


So when , then .


So we have the point .


----------------------------------------------------


Let's find y when :


Start with the given equation.


Plug in .


Square to get .


Multiply and to get .


Multiply and to get .


Combine like terms.


So when , then .


So we have the point .


----------------------------------------------------


Let's find y when :


Start with the given equation.


Plug in .


Square to get .


Multiply and to get .


Multiply and to get .


Combine like terms.


So when , then .


So we have the point .


----------------------------------------------------





Jump to Top of Page
Now let's make a table of the values we just found.


Table of Values:





xy
-4-7


-3-12


-2-15


-1-16


0-15


1-12


2-7

Now let's plot the points:







Jump to Top of Page

Graph:


Now draw a curve through all of the points to graph :


Graph of
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