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The parabola y= ax^2+bx+c is graphed below. Find a+b+c . (The grid lines are one unit apart.)
https://latex.artofproblemsolving.com/c/e/2/ce264d13e5e7038f82ba3bae952d91fdf182b0ff.png

 

The ANSWER IS NOT 4

 Mar 12, 2020
 #1
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The vertex is (2,1) and it has no expansion or contraction, so its equaiton is:  y - 1  =  (x - 2)2

Multiplying out and simplifying:  y  =  x2 - 4x + 5

 

a = 1,     b = -4,     c = 5

 Mar 12, 2020

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