Which equation implies that A and B are independent events

Asmall foreign car gete 42 miles per gallon and user 35 gallons on a trip. gasoline costs $1.05 per gallon. what was the cost of gasoline per mile driver?

Plz i beg u asap ! what is the equation of this graphed line? enter your answer in slope-intercept form in the box.

How is the number of vertices for a prism related to the name of the prism