Question

Edwin graphs the relationship of the gallons of milk he buys in terms of dollars.

Sam buys milk from a different shop. He writes an equation for the amount he spends on milk, p = 3.4g, where p is the cost and g is the gallons of milk bought. Who buys milk at a lower rate, and what is the price?

Answer 1

Sam buys milk at a lower rate for the price of 3.4 per gallon.

Explanation:

Answer 2

Edwin's graph
y = 7 when x = 2.

Sam's equation
P = 3.4g

Edwin:
y = kx
k = y/x = 7/2 = 3.5 cost per gallon
y = 3.5x

Sam's equation:
P = 3.4g
y = 3.4x

Sam buys milk at a lower rate for the price of 3.4 per gallon.

Edwin buys milk at 3.5 per gallon