Are the ratios 2: 1 and 14: 7 equivalent?

Yes they are. One easy way to check this is to actually treat them as fractions. Do the division, and you'll see you get 2 in both cases.

When rates are expressed as a quantity of 1, such as 2 feet per second or 5 miles per hour, they are called unit rates. if you have a multiple-unit rate such as 120 students for every 3 buses, and want to find the single-unit rate, write a ratio equal to the multiple-unit rate with 1 as the second term.

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