How do i find the answer to this question

Slope = (8-2)/(-7 - 0) = -6/7

y - 2 = -6/7(x - 0)
y - 2 = -6/7 x
7y - 14 = -6x
6x + 7y = 14

answer is C.
6x + 7y = 14

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.