Answer:
3
Explanation:
remember the equation y=m*x+b? well, b and m are both numbers
in this case, m is 3, since 3x= 3*x and b=5.
m is the slope, and b is the y intercept (what y is when x is equal to 0)
a line is parallel if the slope doesn't change but the y intercept changes, aka moving the line up or down. ask me questions in the comment section if you have any