The correct answer is c. In order to initially observe the relationship between the two variables we can use a scatter plot.
A scatter plot is a form of plot or mathematical diagram that uses Cartesian coordinates to display values for typically two variables for a collection of data. It is also known as a scatter graph, scatter chart, scattergram, or scatter diagram. One more variable can be shown if the points are color-, shape-, or size-coded. The data are represented as a set of points, where each point's position on the horizontal axis is determined by the value of one variable, and its position on the vertical axis by the value of the other variable.
In order to initially observe the relationship between the two variables we can use a
a. histogram
b. bar graph
c. scatter plot
d. pie chart
Learn more about scatter plot here:
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