Andrea bought tacos from a food truck and left a 25%, percent tip of $2.00
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The given graph is a downward parabola.
The roots of the equation is -2 and -8, and the vertex is (-5,7).
The general root form of parabola will be,
a(x-(-2))(x-(-8))=a(x+2)(x+8).
The value of a can be determined from the coordinate of vertex,
Thus, the required quadratic is,
The value of f(-6) can be determined as,
Thus, the requried value of f(-6) is 6.22.
