Remember that the slope intercept formula is:
y = mx + b
m is the slope
b is the y-intercept
If lines are parallel then they have the same slope (m)
This means that the slope of the line will be 3
y = 3x + b
Now we must find b
To do that you must plug in the point the line goes through in the x and y of the equation.
(5, 2)
2 = 3(5) + b
2 = 15 + b
-13 = b
y = 3x - 13
Hope this helped!
~Just a girl in love with Shawn Mendes