Eh yo creo que no, si estoy mal los siento
He charges 4.75 per lb....
so 5 lbs would cost (5 * 4.75) = $ 23.75 <==
Since the two numbers vary directly, if Y is quadrupled, X will do the same. 2 times 4 is 8, 15 times 4 is 60.
X = 60.
Hope that helps!! :)
The slope form equation is: y=mx+b so once you plug in the numbers available through the diagram you get.
y=3x+4