![]() A quadratic function is a function of the form f of x equals ax squared plus bx plus c, where a, b, and c are real numbers and our a value does not equal 0. Those are also known as second degree functions. We're now going to go up one degree and look at quadratic functions. Now, you should already be familiar with solving linear and quadratic equations, and in the previous session, we looked at linear functions. We also know that if x = h + 1, then y = a + k, so the point (h + 1, a + k) = (4, -16) will be on the graph.įinally, we know that if x = h – 1, then y = a + k, so the point (h – 1, a + k) = (2, -16) will be on the graph as well.Hi, my name is Rebecca Muller. Here, we can see that a = 2, h = 3, and k = -18, which means the vertex of the parabola is at (h, k) = (3, -18), and this is the first point we will graph. Once again, consider the quadratic function in vertex for from earlier examples: Example 1: Drawing A Graph Using Vertex Form Let’s take a look at some examples to see how this works in practice.
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