We have the following:
what is the constant of variation?
[tex]\begin{gathered} c=\frac{80}{32} \\ c=2.5 \end{gathered}[/tex]The constant of variation is 2.5
write an equation to represent the situation
[tex]y=2.5\cdot x[/tex]how many questions do you need to answer correctly to get a grade of 90?
[tex]\begin{gathered} 90=2.5\cdot x \\ x=\frac{90}{2.5} \\ x=36 \end{gathered}[/tex]you need to answer correctly 36 questions
