With math!

using the equation above for the line of best fit (y = 1.5x + 9), predict the length of the spring when 20 weights are attached.

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?