Answer: Mika has not described a proportional relationship. Although it is a linear function, it does not pass through the origin.
Step-by-step explanation: if you place those points on a graph, they do create a linear function; the line just doesn't pass through the origin.
Given data:
The expression of the first option is,
Thus, the above expression are not equivalent.
The expression in the second option is,
Thus, yes they are equivalent.
The expression in the third option is,
Thus, the above expression are not equivalent.
The expression in fourth option is,
Thus, yes the above expression is equivalent.