You know the value easily at x=3, you know that it is symettric about x=3, and an easy point to do in your head is x=8 and x=5
do those in your head, with the symettry about x=3, and you have the sketch.
sketch the graph of quadratic function. identify vertex and x-intercepts
f(x)=(x-3)squared-1
2 answers
Find a formula for the quadratic function whose graph has a y-intercept of y = 13 and zeros at x = 1, 6.