Final answer:
The equation that demonstrates the relationship between the length of your arm (l) and your height (h) is 3/8h = l.
Step-by-step explanation:
The equation that demonstrates the relationship between the length of your arm (l) and your height (h) is option A, which is 3/8h = l.
This equation represents that your arm length (l) is usually about 3/8 of your height (h).
For example, if your height is 64 inches, you can find the length of your arm by multiplying 3/8 by 64, which gives you an arm length of 24 inches.