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find a formula for the quad function whose graph has y-int @ y=7 and zeros at x=1 and x=5 

 Mar 3, 2019
 #1
avatar+101856 
+1

We have that

 

y  = a( x - 1) ( x - 5)

 

And if the y intercept is 7.....then the point (0, 7) is on the graph.....so we have

 

7 = a(0 - 1) (0 - 5)   

 

7 = a (5)     divide both sides by 35

 

a = 7/5 

 

So....the function is

 

y = (7/5)(x - 1) ( x - 5)

 

y = (7/5) (x^2 -6x + 5)

 

y = (7/5)x^2 - (42/5)x + 7

 

 

cool cool cool

 Mar 4, 2019
 #2
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thank you for your help

Guest Mar 4, 2019
 #3
avatar+101856 
0

OK>>>>no prob !!!!

 

cool cool cool

CPhill  Mar 4, 2019

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