Question

Femur Length (cm)	Height (cm)
		45.4	182.6
51.6	206.8
50.3	202.9
48.3	203.2
38.4	160.5
47.2	188.4
41.9	167.6
45.7	178.4
42.1	160.1
43.9	190.2

Give the equation of the line of best fit (trend line).
What is the slope of the line?
Explain what the slope means in the context of this problem.

Answer 1

	X	Y	X * Y	X2
	51.6	206.8	10670.88	2662.56
	50.3	202.9	10205.87	2530.09
	48.3	203.2	9814.56	2332.89
	38.4	160.5	6163.2	1474.56
	47.2	188.4	8892.48	2227.84
	41.9	167.6	7022.44	1755.61
	45.7	178.4	8152.88	2088.49
	42.1	160.1	6740.21	1772.41
	43.9	190.2	8349.78	1927.21
	45.4	182.6	8290.04	2061.16
Total	454.8	1840.7	84302.34	20832.82

Equation of the line is

b = 3.9545

a = 4.2201

Equation of the line becomes  

What is the slope of the line?

3.9545 is the slope of the equation.

Explain what the slope means in the context of this problem.

Slope mean the change in dependent variable as independent variable changes.