Aquantity q varies directly with a quantity p. when q = 42 and p = 21, what is the constant of proportionality

42 and 21 are constants their numbers

When rates are expressed as a quantity of 1, such as 2 feet per second or 5 miles per hour, they are called unit rates. if you have a multiple-unit rate such as 120 students for every 3 buses, and want to find the single-unit rate, write a ratio equal to the multiple-unit rate with 1 as the second term.

(x) - (y) = (1 + 4i)

(3 + 6i) - (2 + 2i) = (1 + 4i)