Question

A student is attempting to find an equation for a line that passes through two points. Which statement best applies to the mathematical work shown

Given the points (1, –2) and (2, 3), to find the equation of the line that passes through the two points, I first find the slope. I find that 2003-10-01-00-00_files/i0250000.jpg. I then find the y-intercept by 2003-10-01-00-00_files/i0250001.jpg, which implies b = 1. Therefore, y = x + 1.
A.
the student did not use the correct formula to find the slope
B.
the student used the correct formula find the slope, but made a calculation error