Help needed has to due with a graph Iris is calculating the relationship between the square feet of living space in a house and the property tax. She collected data on 8 houses in her neighborhood. Iris graphed the data using x as the square feet of living space in a house and y as the property tax on that house.

Which equation best fits Iris' data that describes the relationship between square feet of living space in a house and its property tax?

y=72x−0.6

y=0.6x−72

y=−0.6x−72

y=−72x−0.6