+0  
 
+1
239
3
avatar+1441 

Thanks! :D

AnonymousConfusedGuy  Dec 20, 2017
 #1
avatar+7340 
+2

f(2)   =   2(2)2- 3   =   5

 

The first part of the function ends at the point  (2,5) .  So the second part of the function must go right up to that point. The line  f(x)  =  ax + 4  would pass through  (2, 5)  if  x  had no restrictions. So...

 

a(2) + 4  =  5

 

2a  =  1

 

a  =  1/2

 

Here's a graph:  https://www.desmos.com/calculator/wdefhkmmdz

hectictar  Dec 20, 2017
 #2
avatar+1441 
+3

Thanks so much!

AnonymousConfusedGuy  Dec 20, 2017
 #3
avatar+1441 
+3

Oh! Also, I accidentally clicked out of your message and couldn't figure out how to re-open it but, you were right about my calculator oops!

AnonymousConfusedGuy  Dec 20, 2017

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