Graphing trick?

Is there a trick to graph this function?

Short of trying to grab a ruler and plot it on my computer screen. The Y axis does not have hash marks.

Attachment image

3 Answers

  • RockIt
    Lv 7
    1 month ago

    I notice the graph is of the form y = -a(x-h)^2, i.e. the "trick" is that its y=-ax^2 translated to the right giving rise to: h=4 and a=-4 by factoring.  y=-4(x-4)^2 with 2 positive identical roots.

  • 1 month ago

    No "trick". Just find the y values for x = 2, 3, 4, 5, and 6

  • Jim
    Lv 7
    1 month ago

    We know from Quardratic that vertex is at x = -b/2a = -32/-8 = 4

    Subbing in x=4

    y = -4(16) +32x - 64 so y= 0

    2 same real solutions (4,0), (4,0)

    There is no reason for 'y' axis to have values.

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