Answer:
D) (18,0) is the solution
Explanation:
Both already equal y so set the equation to each other to find x
-1/3x + 6 = 1/3x - 6
subtract 6 from both sides
-1/3x = 1/3x
divide both sides by 1/3
-x = x
The answer must be 0 because that is the only number that works
Now we have (x, y)
To solve for y pick either equation (whichever one seems easier) and set y to 0
0 = 1/3x - 6
6 = 1/3x
18 = x
y intercept because it will come up later:
plug in 0 for x for y intercept
y = 1/3x - 6
y = 1/3(0) - 6
y = -6
y = -1/3x + 6
y = 0 + 6
y = 6
y intercepts are (0, 6) and (0, -6)