Question

Please help me find the answer.

Answer 1

y-intercept = 250

Slope = $-\frac{10}{3}$

Solution:

The y-intercept of the estimated line of best fit is at (0, b).

y-intercept means the point which crosses the line at y-axis.

In the given graph, line crosses at y-axis is (0, 250).

So that b = 250

y-intercept = 250

Take any two points on the line of the graph.

Let the points are (0, 250) and (30, 150).

Slope of the line:

$m=\frac{y_2-y_1}{x_2-x_1}$

$m=\frac{150-250}{30-0}$

$m=\frac{-100}{30}$

$m=-\frac{10}{3}$

Slope = $-\frac{10}{3}$