# How do you graph f(x) = -2 * 3sqrtx?

May 14, 2018

Use Excel to calculate a number of points, $\left(x , - 6 \sqrt{x}\right)$, and plot them on a graph paper.

#### Explanation:

First we note that x must be positive for us to be able to graph it.

We have $f \left(x\right) = - 2 \cdot 3 \sqrt{x} = - 6 \sqrt{x}$

Using for instance Geogebra we get:

If we have to plot it manually on a graph paper, we first need to calculate some points which the graph should go through. The easiest would be to use Excel, where we have the x values in one column and let Excel calculate $- 6 \sqrt{x}$ in another column, like this:

Then we plot the values in our praph paper and draw a nice line through the points that we have ploted.