How long would a foot be if the forearm was 17 inches

Question

Mercury · Answer

Next time please post the full question:

The equation below can be used to find the length of a foot or forearm when you know one or the other. (length of the foot) = 0.860 • (length of the forearm) + 3.302 If you let y = length of the foot and x = length of the forearm, this equation can be simplified to y = 0.860x + 3.302. Using this equation, how long would the foot of a person be if his forearm was 17 inches long?

it gives you the equation y = 0.860x + 3.302, where y is the foot length and x is the forearm length. therefore, you can simply plug in x = 17 into the equation and evaluate y.