If a car travels 210 miles on 12 gallons of gas, what is its unit rate in miles per gallon?

the mistake in the pattern is that :

b. the decimal point was moved one too many place values each time

the correct pattern could be made by :

b. moving the decimal point to the right the same numbers of place values as the exponents

the function makes a strait line horizontally with no x intercept but a y intercept at 9.