Which function is the inverse of f Superscript negative 1 Baseline (x) = negative one-fifth x minus four-fifths?
f Superscript negative 1 Baseline (x) = negative one-fifth x + four-fifths

We are given with two conditions: week 5 having 45 dumpster loads removed and week 10, with 30 loads of dumpsters. we translate this into points (5,45) and (10,30). we find the slope between, we have 15/-5 or -3. we plug in to the equation y-y1 = m (x-x1) where m is the slope. y - 45 = -3 *(x-5). we simplify and get y-45 = -3x +15 or y +3x -60 = 0.