3) Error Analysis Time:
Four students rewrote the equation 12x + 3y = 9 into slope-intercept form. Determine
who did it correctly. If the student did it incorrectly, explain the mistake.
Molly.
12x+3y=9
JARED
12x + 3y=9
3y = 9 - 12x
y = 3-4x
Ali
12x + 3y = 9
4x + y = 3
10/13/2015 -4x+3
Jared: correct or incorrect
Explain:
Molly. correct or incorrect
Explain:
Ali: correct or incorrect
Explain:
Mia: correct or incorrect
Explain:
Mia
3y=9 - 12x
y = 3-12x
12x+3y=9
Geometry CP
3y=9-12x
y = 3-4x
y = 4x - 3