Question

Write the equation of the line in slope-intercept form. 80 y 70 60 50 40 30 20 10 1 2 3 4 5 7 The equation of the line in slope-intercept form is y=

Answer 1

We have the following:

In the graph we can see that the y-intercept is 50, now we calculate the slope as follows

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

The points are (0, 50) and (5, 0)

replacing:

$m=\frac{0-50}{5-0}=-\frac{50}{5}=-10$

The slope is -10, therefore the equation of the line in slope-intercept form is:

$y=-10x+50$