WRAP UP AND ASSESSMENT
The gradients of a straight line is given as gradient = change in y / change in x.
The gradient of a curve at a point is given by the gradient of the tangent at that point.
The gradient at a turning point of any quadratic equation equals zero.
Exercise 14.5 no 1; the figure below (the text recommended) represents the graph of the function y = x2 + 4x – 5, (a) use the given tangents to find the gradient of the curve at (i) A (ii) B.
(b) Use the Graph to find the roots of the function.
(c) State the equation of the line of symmetry of the curve.
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