Berto has $12 to put gas in his car. if gas costs $3.75 per gallon, which ordered pair on the graph of the line relating number of gallons of gas, x, to the total cost of the gas, y, includes the greatest amount of gas berto can buy?

Problem: Berto has $12 to put gas in his car. If gas costs $3.75 per gallon, which ordered pair on the graph of the line relating number of gallons of gas, x, to the total cost of the gas, y, includes the greatest amount of gas Berto can buy?  

Answer/ Solution:

Given:  
$ 12 – Berto’s money
$3.75- gas cost/ gallon  
Asked: Which ordered pair on the graph of the line relating number of gallons of gas, x, to the total cost of the gas, y, includes the greatest amount of gas Berto can buy.

(x , y)
 x=?
y= 12
 x= 12/ 3.75
= 3.2  

X= 3.2

Ithink the answer is b.