Intermediate Macroeconomics

Help me on this topic, Consumption function

_l L When my Professor was presenting the idea of the Consumption Function, and the question arose about the assumption that the marginal propensity to consume is assumed to be constant. This assumption means the function is linear. Help me to nd national income data and plot the levels of consurnption spending against GDP for a series of years to see if the relationship looks linear or not. Use Excel or equivalent to produce a scatter of points. Also, try to estimate the value of the MPC (the slope of the line)