We have y - 2 = m(x + 5), where m = (-1 - 2)/(10 + 5) = -3/15 = -1/5; Then y - 2 = (-1/5)(x + 5); 5y - 10 = (-1)(x + 5); 5y - 10 = -x - 5; x + 5y - 5 = 0 is the equation of the line.
I believe it’s C, 21 divided by 7. This one doesn’t leave any extra mugs out cause 21 divided by 7 is 3, leaving 7 mugs per 3 shelves and having none left.
