What is the equation of the line?

a. y= - 4x
b. y= - 1/4x
c. y=1/4x
d. y=4x

The equation of the line is -1/4x=y. If you want to determine what is negative or positive, you look from the left to right. Looking from there, if it is positive, the line would go up, but if it is negative, then it would go down, which it is in this case. Now, to see if it is actually 1/4, try "rise over run." Rise indicates how high you go on the y axis and the run would indicate where you would go on the x axis. Here, the y axis goes up one, and the x axis goes right by 4 (Remember, it is negative)