Question 1058165
64-----100
79-----160
x is independent and y changes as x changes.  So x is temperature.
The slope is change in y over change in x
That is 60/15
Point slope formula
y-100=4(x-64)
y-100=4x-256
y=4x-156
This would say when the temperature is 0, there are minus chirps.  Typically in these problems, the intercept makes no sense and is not used.
It does say that chirping stops at x=39 degrees where y=0.
There are 4 more chirps per minute with each increase in temperature of 1 degree F.
{{{graph(300,300,-10,100,-10,200,4x-156)}}}