What is the slope for the points (-1, 1) and (2, 3)?

To describe a sequence of transformations that maps triangle abc onto triangle a"b"c", a student starts with a reflection over the x-axis.how should the student complete the sequence of transformations to map triangle abc onto triangle a"b"c"? plz

One integer is 8 times another. if the product is 72, then find the integers

What is the missing step in this proof ?