17. Biologists have noticed that the chirping rate of crickets of a certain species is related to temperature, and the relationship appears to be very nearly linear. A cricket produces 113 chirps per minute at [tex]70^{\circ} \mathrm{F}[/tex] and 173 chirps per minute at [tex]80^{\circ} \mathrm{F}[/tex] .
(a) Find a linear equation that models the temperature [tex]T[/tex] as a function of the number of chirps per minute [tex]$N$.[/tex]