## How to Plot a Quadratic Function in R

For the following quadratic function: \(f(x) = x^2 + 2x – 20\) Here’s the plot that we want to produce: Coding the function f(x) in R A quadratic function is a function of the form: \(ax^2 + bx + c\), where \(a \neq 0\). So for \(f(x) = x^2 + 2x – 20\): a = …