Answer:

Step-by-step explanation:
For this case we need a line parallel to the plane x z and yz. And by definition of parallel we see that the intersection between the xz and yz plane is the z axis. And we can take the following unitary vector to construct the parametric equations:

Or any factor of u but for simplicity let's take the unitary vector.
Then the parametric equations are given by:



Where the point given 
And then since we have everything we can replace like this:




Slope: -2
Y-intercept: 8
If there is ever a plus or minus symbol not containing an x variable, that will be the y-intercept. Anything with an x variable will be the slope.
Answer:
no
Step-by-step explanation:
The ratios of the two shortest sides are different:
3/2 ≠ 5/4
so the quadrilaterals cannot be similar.