6 inclassexercises

?mtcars

section1

**mpg** Miles/(US) gallon
**cyl** Number of cylinders
**`disp**   Displacement (cu.in.)
**hp**Gross horsepower
**drat**    Rear axle ratio
**wt**  Weight (1000 lbs)
**qsec**    1/4 mile time
**vs**  Engine (0 = V-shaped, 1 = straight)
**am**  Transmission (0 = automatic, 1 = manual)
**gear**    Number of forward gears
**carb**    Number of carburetors

section2

\[mpg=\frac{miles\;travelled}{gallons\;of\;gas}\]

section3