The ratio table shows the costs for different lengths of silver chain. Find the unit rate in dollars per inch Length (inches) 16 18 20 22

Cost (dollars) $36.00 $40.50 $45.00 $49.50

The unit rate is $__ per inch.

First step is to get rid of the square root. remember that a square root is the same as raising to the (1/2) power. see below: multiply exponents per exponent rules to get: remember you subtract exponents from the denominator and add exponents in the numerator so: simplify further: so a is the correct choice. if you don't understand this google exponent rules and it will you understand. look at the image results.