The formula for determining the slope of a line is expressed as
slope = (y2 - y1)/(x2 - x1)
where
y2 and y1 are initial and final values of the y coordinate of two suitable points chosen on the graph
x2 and x1 are initial and final values of the x coordinate of two suitable points chosen on the graph
Considering the coloured points on the graph,
When x1 = - 3, y1 = - 2
When x2 = 0, y2 = 2
Thus,
Slope = (2 - - 2)/(0 - - 3) = (2 + 2)/(0 + 3)
Slope = 4/3
