Posted by **Forward 27** on Wednesday, September 4, 2013 at 12:44am.

A student used points (150,80) and (50,30) but wrote the equation y=5x + 0.5. What mistake did the student make?

- Math -
**Henry**, Wednesday, September 4, 2013 at 7:43pm
(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.

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