Answer:
B) Δy
Step-by-step explanation:
Where we analyse a linear function, we must consider variations of each variable.
Also, linear functions variate according to its constant ratio of change, which is defined as
[tex]r=\frac{\Delta y}{\Delta x}[/tex]
Which is the variation of the vertical value, regarding x-values.
So, if we want to show this variation, we must include a colum [tex]\Delta y[/tex], which shows the variation we need, because it's the dependent value, then we can analyse the variation of the function for a certain x-interval.
Therefore, the right answer is B.
