Pl !

the graph shows two lines, a and b.

part a: how many solutions does the pair of equations for lines a and b have? explain your answer. (5 points)

part b: what is the solution to the equations of lines a and b? explain your answer. (5 points)

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.