Answer:
= 18x + 4y hope this helps :)
Step-by-step explanation:
For this case we have that by definition, the equation of a line of the point-slope form is given by:

Where:
m: It's the slope
It is a point through which the line passes
To find the slope, we need two points through which the line passes, observing the image we have:

Thus, the equation is of the form:

We choose a point:

Finally, the equation is:

Answer:

Part 1:
3,0,-2,7
Part 2:
A,C,D
-sin(-x)/cos(-x)*cos(-x)/sin(-x)
Simplifying, we get 1
No they are not equivalent