Question

the scatter plot and line of best fit below show the length of 5 peoples femur (the long leg bone in the thigh) and their height in centimeters. what is the meaning of the x - value on the line when y = 170?
answer
the height of an
actual person with a
femur length of 42.8
centimeters is 170
centimeters.
the height of an
actual person with a
femur length of 170
centimeters is 42.8
centimeters.
an expected height of
42.8 centimeters
when the femur has a
length of 170
centimeters.
an expected height of
170 centimeters when
the femur has a length
of 42.8 centimeters.

Explanation:

In a scatter - plot with a line of best fit, the \(x\) - axis represents the femur length and the \(y\) - axis represents the height. When we consider a point \((x,y)\) on the line of best fit, it gives an expected relationship. Here, when \(y = 170\) (height), the \(x\) - value on the line of best fit gives the expected femur length for that height.

Answer:

An expected height of 170 centimeters when the femur has a length of 42.8 centimeters.