What can you conclude from the graph?

Which of the following is most likely the next step in the series? a3z, b6y, c9x, d12w, е15v, f18u

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?

In the diagram, gef and hef are congruent. what is the value of x