# RELATING THE NUMBER OF TV'S TO LIFE EXPECTANCY
# ==============================================
# FIRST, make sure Desktop is your default directory

# NEXT, read in datafile TVlife06.txt using read.table() command
# and call the table tvlife


# NEXT, give column names to replace V1, V2, and V3 by using colnames()


# NEXT, make variable tvlife[,2] be life
# and variable tvlife[,3] be TV
# and make variable called logTV be log(TV)
# and variable called loglife be log(life)
# remember that log() is the natural log



# NEXT, run linear model of life on TV
# and call it model10
# also make summary of model10
# and scatterplot with best fit line on it
# and make residual plot with x axis on it


# NEXT, run linear model of loglife on TV 
# (which is loglife ~ TV)
# and call it model20
# get scatterplot and summary stats on model20
# which has line of best fit on it.
# Also get residual plot of model2 with x axis on it

# NEXT, run linear model of loglife on logTV
# and call it model30
# Include summary and scatter plot,
# with line on plot
# and residual plot with 0 line on plot


# NEXT, run linear model of life on logTV
# include scatterplot with line on it
# and summary and residual plot with x axis on it.
# Call the model model40