A student used points (150,80) and (50,30) but wrote the equation y=5x + 0.5. What mistake did the student make?
(150,80), (50,30).
m =(30-80)/(50-150) = -50/-100 = 0.5
Y = mx + b
Y = 0.5*150 + b = 80
b = 80-75 = 5
Eq: Y = 0.5x + 5
Error: The student interchanged the slope and Y-intercept.