Answer:
Spencer and Abigail are correct
Lauren is incorrect
Explanation:
Spencer and Abigail are correct
Slope = change in y ÷ change in x
Or

Let
= (3, -1)
Let
= (5, 4)

This is Spencer's method
Let
= (5, 4)
Let
= (3, -1)

This is Abigail's method
It doesn't matter which point you label as point 1 and point 2, as long as you carry out the slope calculation correctly.
Lauren's calculation is wrong as she calculated her slope as:
where it should have been
