Answer:
y = mx+b is where you use the X-axis point and Y-AXIS point and plug it into the equation and find the y-axis using the x-axis times the slope and then you find b which is the remaining y-axis height, and you get your answer
Explanation:
y 2 -y 1 can be any order as long as the x2 is with the y2 and same for x1.