<u><em>Answer:</em></u>
The equation is: y = 5x - 268
<u><em>Explanation:</em></u>
<u>We are given that:</u>
At 73°F, the chirp is 97 times per minute .........> first point is (73, 97)
At 80°F, the chirp is 132 times per minute .......> second point is (80, 132)
<u>The general equation of the linear line is:</u>
y = mx + c
where m is the slope and c is the y-intercept
<u>1- getting the slope:</u>
<u>The slope can be calculated using the following rule:</u>
<u>Substitute with the given points to get the slope as follows:</u>
<u>The equation, now, became:</u>
y = 5x + c
<u>2- getting the y-intercept:</u>
To get the y-intercept, use any of the given points and substitute in the rule we got in part 1. I will use the point (80, 132)
<u>Therefore:</u>
y = 5x + c
132 = 5(80) + c
c = 132 - 5(80) = -268
<u>The equation, therefore, is:</u>
y = 5x - 268
Hope this helps :)