Yes..it does. To be a function, all the inputs (x's) have to be different numbers...there can be no repeating x's...there can be repeating outputs (y's)...just not the x's
It would be 7 because if you multiple 6 you get 1
And you know right this girl has how many years of the first type of quantity of correspond to one unit of the second type of quantity
Answer:

Step-by-step explanation:
Slope = m = -4
Y-intercept = c = -7 ( Because that is the point where x = 0 )
<u>Equation:</u>

So, The co-efficient of x is -4.
![\rule[225]{225}{2}](https://tex.z-dn.net/?f=%5Crule%5B225%5D%7B225%7D%7B2%7D)
Hope this helped!
<h3>~AH1807</h3>
I believe its 80 if you derive it out, but there is no units of measurement.