Me on all 7 if you can only solve some don't hesitate & say those

Classify the following triangle check all that apply

Lindsay used two points, (x, y; ) and (+2.82), to find the equation of the line, y = mx + b, that passes through the points. y2-y, first, she used the definition of slope and determined that the value of mis x, - . given this information, which expression must represent the value of b?

Solve this equation using substitution. {4x + y = −2} {4x + 6y = 44}