Which type of graph or chart will you use to show changes in data points?
a). pie chart
b). scatter plot graph
c). column chart
d). bar graph

(B) Scatter plot graph

Explanation:

 The scatter plot is one of the type of graph which is used to showing various types of changes by using the data points. The scatter plot are basically used to plot the data vertically and horizontally axes.

In the scatter plot graph, the one variable are basically affected by the another type of variable. The correlation is refers to the relationship between the two types of variable.

On the other hand, all the other options are not represent the changes in the form of data points. Therefore, option (B) is correct.  

maybe when you are listing people names in a job.

i am not 100% sure