In 1992, the moose population in a park was measured to be 4260. by 1996, the population was measured again to be 3660. if the population continues to change linearly: a.) find a formula for the moose population, p , in terms of t , the years since 1990. p ( t ) = b.) what does your model predict the moose population to be in 2008?

In 1992, the moose population in a park was measured to be 4260. By 1996, the population was measured again to be 3660. If the population continues to change linearly: A.) Find a formula for the moose population, P , in terms of t , the years since 1990. P ( t ) = B.) What does your model predict the moose population to be in 2008?

Model predict the moose population to be in 2008 is 1860

Solution:

Let us consider this problem on graph, taking the x axis to be years since 1990 and y on the graph be the number of moose

We have two points on the graph:  (2, 4260) and (6, 3660)

Using the slope formula we can find the slope :

m = -150                                  

Now that we have the slope of the line, we can use the point-slope formula to find the equation for the line as follows:-

Since the formula that is being sought is supposed to be interms of P and t, we will replace y with P and x with t

P(t) = -150t + 4560

Number of years from 1990 to 2008 is  

2008 - 1990 = 18

So, population in 2008 will be

P(18) = -150 (18) + 4560

P(18) = -2700 + 4560

P(18) = 1860

Thus the model to predict the moose population in 2008 is found

answer for #1 is c

answer for #2 is d

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