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If \(y = x^2 - 7\) and \(x\) is a real number, then what is the minimum value possible for \(y\)?

 Jul 30, 2019
 #1
avatar+111389 
+1

y = x^2  - 7

 

This is  the parabola y = x^2 shifted down by 7 units

Thus.....the minimum value for y  = -7

 

Here's a graph, Logic  : https://www.desmos.com/calculator/torephbrbq

 

cool cool cool

 Jul 30, 2019
 #2
avatar+1198 
+1

thanks CPhill you are the best!

 Jul 30, 2019
 #3
avatar+111389 
0

Not the best.....but....I try hard  .....LOL!!!!

 

 

cool cool cool

CPhill  Jul 30, 2019

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