Answer:
y = 1.5x - 5
Explanation:
gradient (slope) = (change in y) ÷ (change in x)
= (-2 - 1) ÷ ( 2 - 4)
= -3 ÷ -2
= +1.5.
equation of straight line is y – y1 = m (x – x1), where y1 and x1 are the coordinates of a given point.
pick one of the two points. (4, 1) is simplest.
y - 1 = 1.5(x - 4)
y - 1 = 1.5x - 6
y = 1.5x - 6 + 1
y = 1.5x - 5