Question

Write an equation for the trend line shown on the scatter plot.

Answer 1

y = 5x + 15

Explanation:

You can pick any two points on the graph that intersect the trend line. For instance (5,40) and (3,30)

Formula for Slope:

`y = (y_2 - y_1)/(x_2 - x_1) = (40 - 30)/(5 - 3) = (10)/(2) = 5`

y intercept:

`y = 15`

Equation of a line:

`y = mx + b\\m = slope \\b = intercept \\\\y = 5x + 15`

** also be cautious of the different scaling of the x and y axis.