The vertex is supposed to be a point, (x, y) = (h, k). Try using the formula to get the value of h, and then plug that into f(x) to find the value of k.
To find the intercepts, plug in zeroes where appropriate. To find the x-intercepts, either
factor or else use the
Quadratic Formula. To find the y-intercept, simply evaluate.
If you are unsure of your answers, please reply
showing your work. Thank you.