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Find the vertex of the graph of the equation y=-2x^2+18x-15.

 Nov 26, 2021
 #1
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I inputed your equation on a special online graphing calculator. 

Here you are. 

Hope this helps. 

 Nov 26, 2021
 #2
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Vertex of this dome shaped parabola occurs at the x value = - b/2a = -18/(2*-2) = 4.5

   the y value will be

      -2(4.5^2) + 18 * 4.5 -15 = 25.5  

 Nov 26, 2021

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