Quadratic Graphs – Higher Diagnostic Quiz Ready to test your knowledge? Identify the \(y\)-intercept of the graph with equation \(y = (x + 3)(x - 2)\). (0, -3) (0, 2) (0, -6) (0, 0) Below is a sketch of the graph with equation \(y=x^2-x-12\). What are the values of \(a\) and \(b\)? \(a = 2\) and \(b = -6\) \(a = -2\) and \(b = 6\) \(a = 3\) and \(b = -4\) \(a = -3\) and \(b = 4\) Below is the graph of \(y=x^2-2x-3\). Use the graph to find the roots of \(x^2-2x-3=0\). \(x=3\) and \(x=-1\) \(x=4\) and \(x=-2\) \(x=0\) and \(x=2\) \(x=-3\) Below is the graph with equation \(y=x^2-2x-3\). Use the graph to find the turning point of the graph of \(y = x^2-2x-3\). (-1, -4) (-1, 4) (1, -4) (1, 4) The graph below shows the curve with equation \(y = x^2 - 2x - 1\). Use the graph to solve \(x^2 - 2x = 3\). \(x = 0.4\) and \(x = 2.4\) \(x = -1.2\) and \(x = 3.2\) \(x = 0\) and \(x = 3\) \(x = -1\) and \(x = 3\) Which of the following is the correct graph for the equation \(y = x^2 - 3x + 1\)? By completing the square, find the coordinates of the turning point of the curve with equation \(y=x^2+2x+5\). (-2, 1) (2, 1) (-2, 4) (-1, 4) Which of these is the graph with equation \(y = x^2 - 3x + 2\)? By completing the square, find the coordinates of the turning point of the graph with equation \(y = 2x^2 + 4x - 7\). (1, -5) (-1, -9) (-1, -11) (1, -6) The graph below shows the line with equation \(y = x^2 - 2x - 1\). Use the graph to solve \(x^2 - x - 2 = 0\) \(x = 0.4\) and \(x = 2.4\) \(x = 0\) and \(x = 2\) \(x = 0\) and \(x = 3\) \(x = -1\) and \(x = 2\) Time is Up! Time's up More?