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The scatter plot shows the relationship between study time and test scores Which equation could be used to describe a best-fit line?

The Scatter Plot Shows The Relationship Between Study Time And Test Scores Which Equation Could Be Used To Describe A Bestfit Line class=

Sagot :

To find the equation that describe the fit, we have to find the slope and the intercept with the y axis, in the graph we can see that the intercept is 62.5 and the slope can be find with this equation:

[tex]m=\frac{y_2-y_1}{x_2-x_1}[/tex]

So we replace two coordinates, so i can see (10, 65) and (40, 75) so:

[tex]m=\frac{75-65}{40-10}=\frac{10}{30}=\frac{5}{15}=\frac{1}{3}[/tex]

So the equation is:

[tex]y=\frac{1}{3}x+62.5[/tex]

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