Write the equation, in slope-intersept form, of a line with an undefined slope and an x intercept of -7

How do i do this activity, is appreciated

1mile equals approximately 1.6 kilometers. which best approximates the number of miles in 6 kilometers?

Aswimming pool measures 22ft by 12ft and is 4ft deep. if the pool is being filled at 2.5 cubic ft per minute, how long will it take to fill the pool?