Maths Portfolio 2

... Math Portfolio: Body Mass Index Heikki Suomalainen 10.10.2008 Body mass index is acquired by dividing one's weight with the square of his/her height. In the following I will examine what sort of function could be used to predict and present the change in female's body mass index. Graph 1 The following table (Table 1) gives the median BMI for females from two to twenty years of age from United States (2000). Graph 1 presents the data from Table 1 in graphical form. Age is positioned on the X-axis and body mass index on the Y-axis. Graphs settings are following: Table 1 Age (yrs) BMI 2 16,40 3 15,70 4 15,30 5 15,20 6 15,21 7 15,40 8 15,80 9 16,30 10 16,80 11 17,50 12 18,18 13 18,70 14 19,36 15 19,88 16 20,40 17 20,85 18 21,22 19 21,60 20 21,65 Graph 1 This set of values can be modelled by using following quartic function: where Following graph presents the modelled function in comparison to the data points from Table 1 which are circled for clearer presentation. Graph 2 The function drafted in Graph 2 follows the datapoints given obediently and no significant difference can be found. Besides quartic function,

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