The equation of the line in "slope-intercept" form is:

This is called the slope-intercept form because "m" is the slope and "b" gives the y-intercept (the y value for x=0).
It's not very clear which is the equation is are referring to but all the below equations have the "slope-intercept" form:
y=−13x+2
y = 3x + 2
y=−3x+2