the of years since 1980. 160 155 150 145 140 135 130 125 5 10 15 20 2530 Find th

Question

the of years since 1980. 160 155 150 145 140 135 130 125 5 10 15 20 2530 Find the linear function y, where y depends on t, the number of years since 1980. Recall a linear function of y in terms of t has the form y a mt + b. After selecting two points on the graphed line, find the slope of the line m that passes through the points and sub for m in the function. Is there more than one method to solve for the value of b in this function? Can another point on the graphed line be subetituted in the equation and then solved form of an equation be used to solve for b L1 eBook 10. the number of years since 1980. Find the linear function, y Use the graph below, which shows the profit, v, in thousands of dollars, of a company in a depends on t, the number of years since 1980 140

Explanation / Answer

the line passes through ( 15 , 155 )

and ( 25 , 125 )

slope = ( 125 - 155 ) / ( 25 - 15 )

slope = -3

applying point slope form of equation

y - 155 = -3 ( x - 15 )

y = -3x + 200

or

y = - 3t + 200

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