Find the distance between the points (-7, 4) and (5, -4)

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?

How do you find principle and simple interest

I’m still confused on how to work the percentages