I need help with rate of change can anyone help I will post the question below

Question

anonymous · Answer

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? 

What is the rate of change of the equation from Part A? 

Compare the equation from Part A to your data. Are they the same? Which has a greater rate of change? Why do you think the values are different?

mathmale · Answer

Think:  In this situation the "rate of change" is the slope of the given linear equation.  What is m in that equation?