Three more than six times a number is 33

The following frequency table relates the weekly sales of bicycles at a given store over a 42-week period. value01234567frequency367108521(a) in how many weeks were at least 2 bikes sold? (b) in how many weeks were at least 5 bikes sold? (c) in how many weeks were an even number of bikes sold?

Idon’t understand! use slope intercept form to solve: through: (2,5) slope= undefined

W-16=-12 solve each one step equation plz