9. Is it true that if a quadratic function is written in standard form f(x) = ax + bx + c we can apply the Vertex Formula to find the Vertex. The Vertex is the point V (? 10. For the given quadratic functions find the vertex applying the vertex formula V ( a) y = x2 - 9x +14 11. Is it true a) to find x -intercept, you should let y=0 and find x. The result will be the point (x,0)? b) to find y - intercept you should let x = 0 and find y. The result will be the point (0, y)? 12. Find the points of the x- and y-intercepts. a) y = x2 - 9x +14b) y = (x -1)? -4 c) y = x2 - 3x +10d) y = (x -1)? + 4 Tip. Remember if D