Question 2599
The equation is
y=mx + c

where m is the slope of the line

y intercept means distance of the point where line is intersecting the y axis from the (0,0).
The point where line will intersect y axis the x coordinate will be zero. 

SImilarly for x intercept the y coordinate will be zero...

Now we have the equation

y-3x+1 = 0
so y = 3x -1
For y intercept put x =0 
so y = -1