Question 998605:  Entomologists have discovered that a linear relationship exists between the number of chirps of crickets of a certain species and the air temperature. When the temperature is 70F, the crickets chirp at the rate of 120 chirps/min, and when the temperature is 80F, they chirp at the rate of 160 chirps/min. Find N as a function of T and use this formula to determine the rate at which the crickets chirp when the temperature is 109F. 
 Answer by josgarithmetic(39630)      (Show Source): 
You can  put this solution on YOUR website! Would this be easier or more familiar a problem to solve? 
Find the equation of the line in slope-intercept form which contains the points  (70,120) and (80,160).  Use this equation to find  y for when x=109.
 
 
 
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(x,y) would correspond to  (T, N). 
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