I have recently learned about the functions expFit and logisticFit however when I try to use them on Rstudio they are not recognised.
Examples:
plot(time,mv)
expFit (time, mv, xlab = "Years Since 2000", ylab = "Number of Motor Vehicles")
logisticFit (time, mv, xlab = "Years Since 2000", ylab = "Number of Motor Vehicles")