slope-intercept form y=mx+b
to find the slope:
(y2-y1)/(x2-x1)
(3/4-2/3) divided by (-3/4-4/3)
(9/12-8/12) divided by (-9/12-16/12)
(1/12) divided by (-25/12)
(1/-25) is the slope (m)
Then fill in with your point y=(1/-25)x+b 3/4=(1/-25)(-3/4)+b and solve.
b= 25 to get y intercept value.
Then rewrite equation with your values
y=(1/-25)x+25