Checking Slope-relepi TM
Step 1: 5 = -21-d +
Step 2: 5 = +6
Step 3: 5 - - 6 - 2 +6
A student used the slope-intercept form to write the
equation of a line that has a slope of -2 and passes
through the point (-10,5). The student's work is
shown to the left.
Analyze the steps to identify the error.
O Step1: student switched the x and y values
Step 3: student needed to add to to both sides
44
Step 5: 10-b
Step 6: y=-2x - 4.4
O
Step 5: student subtracted incorrectly
Step 6: student needed to add the b value