Question

How do I find the slope-intercept of a scatter plot using y = mx + b.

Answer 1

step 1

Find out the slope of the trend line

we need two points

(x1,y1) and (x2,y2)

substitute in the formula of slope

`m=((y_2-y_1))/((x_2-x_1))`

step 2

Looking at the graph

Find out the initial value or y-intercept (value of y when the value of x=0)

the y-intercept is the ordered pair (0,b)

step 3

Find out the equation of the line in slope-intercept form

y=mx+b

substitute the value of m and b

to obtain the equation of the trend line