Write the equation of a line that goes through the points (1, 4) and (2, 2).
+129839 (1, 4) and (2, 2)
We need to find the slope of the line between these two points.....this is given by :
[2-4] / [2-1] = -2/1 = -2
So.......using either point and the slope, we can write the equation by using the point-slope form
y - 4 = -2 ( x - 1) simplify
y - 4 = -2x + 2 add 4 to both sides
y = -2x + 6 .... and this is in slope-intercept form
