Answer:
2. The change in expected height for every one additional centimeter of femur length.
Explanation:
1. The expected height for someone with a femur length of 65 centimeters.
Doesn't make sense, that would be height value when centimeters = 65.
2. The change in expected height for every one additional centimeter of femur length.
Makes sense, for every increase in one additional centimeter, we can expect the height to be proportional to the slope.
3. The femur length for someone with an expected height of 2.5 centimeters.
Doesn't make sense, the linear relationship relies on the femur length to get the height.
4. The change in expected femur length for every one additional centimeter of height.
Doesn't make sense, again, the linear relationship relies on the femur length.