Answer: The answer should be y=3x+-4 or y=3x-4.
Explanation:
You should try using 'y=mx+b' where m is the slope and b is the y intercept. So the answer should be y=3x+-4 or y=3x-4 depending on your problem. The x will be a variable. The variable will be a number that you have to insert to get a definite y value, as it is a selected number.