Question

the graph for the equation y=2x+4 is shown below if another poisonous graph so that the system has one solution which equation could that be? y=2x-4 y=2(x+2) y=2(x-4( y=x+4)

Answer 1

y = x + 4

Intersects at (0,4).

Explanation:

y = 2x -4: No solution(parallel)

y = 2(x+2): Infinite many solutions(same line)

y = 2(x-4): No solution(Also parallel)

y = x + 4: One Solution(Intersects at (0,4)).

Answer 2

The graph below shows that y = x+4 has one solution the rest are all parallel.

Explanation: