To graph this equation, we see that it is in the slope/intercept form of y=mx + b, where m is the slope and b is the y-intercept.
d(t)= -2t+18
Start with the y-intercept of 18 (0,18)
From this point, we can start graphing the line by using the slope of -2. Since the slope is negative, it goes up to the left. So we go one to the left, and up two.
Good luck.
Paul
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