Options:
y = 8/5x - 1/2
y = - 5/8x - 1/2
y = 8/5x + 1/2
y = 5/8x - 1/2

Pls! does anybody know a shortcut for answering these types of questions in the future?

Find the number of liters in 12.8 gal of gasoline. round to the nearest hundredths

Tommy buys a sweater that is on sale for 40% off the original price. the expression p -0.4p can be used to find the sale price of the sweater, where p is the original price of the sweater. if the original price of the sweater is 50, what is the sale price?