Question

Use a formula for the quadratic function depicted in the following graph

Answer 1

Step 1

From the graph, the zeroes of the quadratic function are;

`\begin{gathered} x=-1 \\ x=4 \end{gathered}`

Step 2

Find the formula for the quadratic function in the graph.

`\begin{gathered} x+1=0 \\ x-4=0 \\ (x+1)(x-4) \\ x^2-4x+x-4 \\ x^2-3x-4 \end{gathered}`

Hence the formula for the quadratic function graphed is

`x^2-3x-4`