3500+2000 = $5500
5500-2500 = $3000 so it would be 3000
The answer to the question is a
All i know is that the equation of a straight line is y=mx+c .......where m= gradient and c= the y intercept
Look for the y-intercept
since we know the slope is 3 we just going to plug in
-5=3(1)+y
-5-3=y
so the y-intercept is 8 now you can find the equation
y=3x-8