Find the equation of the line shown.
1
0
-2

your didn't give any proper point ,but i assuming the the question as

the line pass through the point (1,0,-2)

so answer is

(x-1)/a = y/b = (z+2)/c,

where a,b,c are constant

Step-by-step explanation:

check above link.

graphically?   well, you graph them both, the solutions is where they both intersect each other, since there are two solutions, meaning they will meet twice, or namely the linear will run into the quadratic curve twice, and where they meet, those x,y coordinates are the solutions to the system.

the 3rd on is correct

step-by-step explanation: