The following table shows the mortality rates (in deaths per 1000 live births) for male and female infants, of all races, in the United States, from 1980 to 1997.

1. Write at least two important conclusions from observing the data in the table.

2. Make a neat and careful graph entitled Infant Mortality Rates by putting Year on the horizontal axis and Number of Infant deaths (per thousand) on the vertical axis. Use the year 1980 as t = 0, and plot both sets of data on the same axis. The resulting graphs should be a series of dots (that is, a scatter plot); use two different styles of dots, for instance, squares and pulses. Do not connect the dots with a line. Label which graph is for males and which is for females.

3. Use your calculator to find the linear regression lines for both the male and femal data sets. Write the equations of the linear regression lines that the calculator gives you, using 4 decimal places for a and b in y = ax + b (x is really the variable t). label which equation represents male infant deaths and which is female infant deaths.

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