Answer:
Scatter diagrams.
Explanation:
Scatter diagrams more popular by the name of the X-Y graph are useful mathematical methods for analyzing the relationship between two variables . as the name implies, it is a type of a paper sheet on which the detail points referring to the interest variables are spaced. The scatter diagram displays pairs of numeric values to seek a correlation between them, with one variable on each axis. If there is a connection between the variables, the points may fall into a line or curve. The better the connection, the more close the dots hug the line.
