Answer: y = 4x + 1
Step-by-step explanation: Simple...
You have your equation... y=mx+b
You are given a coordinate. That is your x and y, and "m" is given already, and it's your slope.
First, you plug them in. You are solving for the unknown y-intercept or the "b".
5=4(1)+b
Then, you solve!
5=4+b
1=b
Parallel lines have the same slope, so the equation would be...
y=4x+1