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What are the coordinates of the vertex for the quadratic function below?

 

f(x)=-5(x-10)^2-8

 Mar 15, 2019
 #1
avatar+235 
+1

-8. Just plug this equation into a graphing calculator and it's easy to see

 

Hope this helps!

 Mar 15, 2019
 #2
avatar+110727 
+1

Thanks LagTho,

Suggesting a graphing calc was a good idea but you have not told guest where to find one or how to use it!

Also a vertex is a co-ordinate, it needs 2 numbers, with brackets, not just one number.

 

This is the best online graphing calc around 

Guest, you can just put your graph equation straight in on the left hand side.

 

https://www.desmos.com/calculator

Melody  Mar 16, 2019

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