Note that if c were zero, the function would be linear. An advantage of this notation is that it can easily be generalized by adding more terms. We could for example write equations such as y = a + bx ...

In this part you do not have to sketch the graph and you may even be given the sketch of the graph to start with. For a quadratic equation of the form \(y = k{(x - a)^2} + b\), the following ...