Answer:
4x + 5y = 20
Step-by-step explanation:
4x + 5y = 20
5y = -4x + 20 (Subtract 4x to isolate 5y. Put the 4x in front of the 20)
y = 
+ 4 (Divide all by 5 to isolate y)
And then it's done and in slope-intercept form
or 
is greater than -1 but less than 0
I hope this helped :)
64 + 43 = 107
107 - 43 = 64
107 - 64 = 43
A proportional relationship would look like y=mx (no y-intercept).
The formula for temperature Fahrenheit involves an offset (y-intercept); this is one reason I claim that the relationship in question is NOT proportional.
x-2
Since Tyler didn't start until Serena had wrapped 2 boxes and they both wrap boxes at the same rate, this could be written as x-2. This works for the second and third images if you plug in the number of boxes Serena has graphed for x in the equation. 3-2=1, 4-2=2.
