It expresses a relationship between two variables (such as x and y), and can be represented by a table of values or a graph.

An equation involving rational expressions.

Determine what type of expression is the given:  $\frac{5x-1}{4x}=5$  

Determine what type of expression is the given:  $12x\ >\frac{1}{x+2}$  

Determine what type of expression is the given:  $p\left(x\right)=\frac{8x-1}{6x+3}$