Question

I need help with this and very important to equation for this problem you have to use Desmos.

Answer 1

The monthly income for the website is given by the subtraction of the earned money by clicks and the cost of running the page, therefore it can be given by the following expression.

`y=0.005\cdot x-120`

To graph the equation we need to find at least two points that belong to the expression. We will search for the point at which "y = 0", because that is the point that the friends will start to profit on the website. The second point will be the one at which "y=100". We have:

For y=0:

`\begin{gathered} 0=0.005\cdot x-120 \\ 0.005\cdot x=120 \\ x=(120)/(0.005)=24000 \end{gathered}`

For y= 100:

`\begin{gathered} 100=0.005\cdot x-120 \\ 0.005\cdot x=100+120 \\ 0.005\cdot x=220 \\ x=(220)/(0.005)=44000 \end{gathered}`

We now need to mark these two points on the coordinate plane and graph the equation.