Plan A is a flat rate of $50 per month unlimited data. Plan B is zero dollars per month but you pay five dollars per gigabyte of data used. If you average about 6 GB of data used per month, which option will be least expensive?

B

Step-by-step explanation:

For Plan A - --> you pay $50 per month flat

For Plan B,

average usage = 6 GB

cost per GB = $5 per GB

average cost per month = $5 per GB x 6 GB = $30

comparing the cost per month between the 2, we can clearly see that for plan B, $30 a month is the least expensive option