1 is parallel (though a little too close for a badly drawn graph to see if actually parallel imho - https://www.desmos.com/calculator worked a treat though)
2 intersects at 4
3 is the same so overlaps
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Trying to sketch parallel lines is always a bit of a challenge!
I’m glad you found the resources useful. It’s pretty versatile and I use it all the time. 
Equation 1) is parallel
Equation 2) has one single crossing point at (0/4)
Equation 3) is on top of the given equation y = 2x + 4
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