-20% February (20-20 is zero, so we're back to the original price we started at here)
+25% March
?? April
Currently, we are 25% more than what we had, so to get back to normal, the price needs to go down by 25 percent. This will put us back to zero. Put another way...
Ax+by=c is the standard form you are given the slope and a point, so first write the equation in point-slope form: y-(-3)=2/3(x-6) expand the equation: y+3=(2/3)x-4 (2/3)x-y=7 is the standard form