Question

Use the following commands to install the `marketing` dataset and load the `datarium` package into your session.
```{r}
#install.packages("datarium")
library(datarium)
data("marketing", package = "datarium")
str(marketing)

Use the regression line to predict the `Sales` amount when `newspaper` budget is `$136.80K` and `facebook` is `$43.92K`.

This should be done in Rstudio 3.6.1

Answer 1

R script

install.packages("datarium")
library(datarium)
data("marketing", package = "datarium")
str(marketing)
y=marketing$sales
x1=marketing$facebook #taken facebook and newspaper only since youtube is not mentioned in question
x2=marketing$newspaper
p=lm(y~x1+x2)
p

result:

predicted model:

y=11.026705+0.199045* x1+0.006644* x2

Sales` amount when `newspaper` budget is `$136.80K` and `facebook` is $43.92K`

=11.026705+0.199045*$43.92K+0.006644* $136.80K

=$20.67766K

sales=$20.67766K