Write an equation in slope-intercept form of the line that passes through the points (1,2) and (-2,-1)

Answer 1

(1,2) and (-2,-1) have a line through them with slope = "rise over run" = the difference in y coordinates divided by the corresponding difference in x coordinates

= (2--1)/(1--2) = (2+1)/(1+2)

= 1 = (y-2)/(x-1)

y-2 = (1)(x-1 )= x - 1

y = x -1 +2

y = x + 1 is the equation in slope intercept form