Group+1F

PARABOLAS
By: Kennedy, Natalie, Ana, and Gabby

You see a rainbow when your outside. You want to plot it as a parabola. The formula for the rainbow is y= -x^2 +4x+3. You need to find the axis of symetry to graph the rainbow.

First you find the axis of symmetry by the formula. The formula is..... __x= -b__ 2a

Then you subsitute in the variables from the given equation. __x= -4__ 2(-1)

Then you solve. __x= -4__ -2

X=2

Now you must graph it. Now put your axis of symetry number in the x column in the middle. Then write two below and two above so it looks like this. Then solve by plugging in your x value to the equation to get the y value.

Then plot your points on the graph. Connect them together and label with the equation.



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