Question

the number of high school students who have taken the military's aptitude test has decreased approximately linearly from about 857.6 thousand students in 1999 to about 539.3 thousand students in 2007. let n be the number of high school students(in thousands) who have taken the test in the year that is t years since 1990.
a) find an equation of a linear model to describe the data
b) graph your linear model.

i found the equation but what i dont get is when it says to graph your linear model, does that mean that i have to creat a scattergram or what do i do their? i am confused HELP!!!!!!

Answer 1

ok... reading the question the time 1999 is 9 years after 1990.
2007 is 17 years after 1990

so you have 2 data points (t, n)

which are

(9, 857.6) and (17, 539.9)

so you can now find the slope of the line...

\[m = \frac{n_{2} - n_{1}}{t_{2} - t_{1}}\]

Answer 2

you need to have you model as a linear relationship

n = mt + b

Answer 3

and be able to graph the straight line...