Answer:
y = x+1
Step-by-step explanation:
Slope-intercept form
(y = mx+b)
m = slope and b = y-intercept
The line crosses the y-axis at (0, 1), therefore the y-intercept (b) = 1
The slope (m) = 1
Because the slope is 1, it does not need to be written in the equation, as any number multiplied by 1 is that number.
For a non-resident:
For a resident:
We want to know the number of days 
such that the two costs are equal ie 
To do this set the two costs equal to each other:
And solve for d:
The costs will be equal when a resident and a non-resident each use the beach for 12 days.
Step-by-step explanation:
1 year = 12 months
2yrs = 24 months
F(c) =100+5(24)
= 100+120
= $220
If 
and 
, then you can replace 
in either equation with the equivalent expression given by the other equation. In this case, you have
and you can solve for 
.
Then 
.
For the second system, you can write
Then substitute this into the second equation and you get
so that
For future reference, you could use Desmos for graphs. but should be (1,1)
