Answer:
The function role is +2 for x, and -1 for y.
Step-by-step explanation:
The reason for my answer is because as you can see on the table;
For X, it starts at 0 and counts up by 2. For Y, it starts at 2 and counts back by 1.
Let
x--------> the time in hours
y-------> the distance in miles
we know that
The speed is equal to

in this problem


<u>Equation First Train</u>

<u>Equation Second Train</u>

---------> equation 
Substitute the values of
and
in the equation 

Solve for x


therefore
<u>the answer is</u>

60. 1 times 60 equals 60 2 times 30 equals 60 3 times 20 equals 60 4 times 15 equals 60 5 times 12 equals 60 6 times 10 equals 60 10 times 6 equals 60 12 times 5 equals 60 15 times 4 equals 60 20 times 3 equals 60 30 times 2 equals 60 60 times 1 equals 60 1 times 36 equals 36 2 times 18 equals 36 3 times 12 equals 36 4 times 9 equals 36 6 times 6 equals 36 9 times 4 equals 36 12 times 3 equals 36 18 times 2 equals 36 36 times 1 equals 36
1 times 48 equals 48 2 times 24 equals 48 3 times 16 equals 48 4 times 12 equals 48 6 times 8 equals 48 8 times 6 equals 48 12 times 4 equals 48 16 times 3 equals 48 24 times 2 equals 48 48 times 1 equals 48
1-2m-5m=15
combine like terms
1 -7m = 15
subtract 1 from each side
1-1-7m = 15-1
simplify
-7m = 14
divide by -7
-7m/-7 = 14/-7
simplify
m = -2