I'm not sure but I'm gonna guess that the answer is 50?
If given the slope and y-intercept, you can directly get the slope intercept form as
y = -12x + 3
Im sorry but im not sure what your asking
Answer:
The horizontal line is the x axis
the vertical line is the y axis
The first number is always the number of the x axis
Example.
(6,9)
6 is in the x axis
9 is in the y axis
find the number 6 in the x axis (the horizontal one) and then go up until the number 9.