Answer:
y= -3/4x-4
Explanation:
This is assuming that you want it in slope-intercept (y=mx+b)
You need to know that
Y= The line
m=Slope
b=y-intercept
Step 1, Replace slope (m)
y= -3/4x+b
Step 2, Replace the y-intercept
y= -3/4x-4
Conclusion to 'what is the equation of the line if its slope is -3/4 and Y-intercept is -4': y= -3/4x-4