Please help its due soon

Math each whole number with a rational,exponential expression

What is the slope of the line (-7,2) (4,6)

Sanderson is having trouble with his assignment. his shown work is as follows: − 3 7 7 3 = − 3 7 × 7 3 = − 21 21 = −1 however, his answer does not match the answer that his teacher gives him. complete the description of sanderson's mistake. find the correct answer.