# $3\mathrm{.}1$ Follow the steps for a to e$,$ then answer the follow$-$up questions

# $1.$ Run linear regression models to predict car price using the given columns

# $2.$ Get the coefficients

# $3.$ Compute the error using rmse function and print it using the pritn function

# a$.$ horsepower, peakrpm, citympg

rmse function$($y$\_$true, y$\_$pred$)\{$

sqrt$($sum$(($y$\_$true $-$ y$\_$pred$)**2/$ NROW$($y$\_$true$)))$

$\}$

variables List $=($

$\text{'}$a$\text{'}$: $(\text{'}$horsepower$\text{'},$ 'peakrpm', 'citympg'$))$

It says "unexpected token $\text{'},\text{'}"$ I am not sure what to do$.$ I am using the R language in this case.