The product you are selling cost 0.45 cents each one, it is equal to (0.0045 dollars).
Let's call x the number of products you make, then the cost for x products is equal to 0.0045x dollars.
If your spending limit is $80, then the cost of the x products must be less or equal to $80, then the inequality is:
[tex]0.0045\cdot x\le80[/tex]In order to write this number in the number line, we need to solve for x, then:
[tex]\begin{gathered} x\le\frac{80}{0.0045} \\ \therefore x\le17777.8 \end{gathered}[/tex]In the number line it is:
