Solution
for this case with the first table we can find the equation of the line using the following formula for the slope:

And the y intercept would be b=2
Then the equation for the first equation is:
y= 2x +2
the second equation is given by:
y= -2x-2
then the best solution would be:
Function 1 has a positive slope and a positive y-intercept. Function2 has a negative slope and a negative y-intercept