Algebra 1

a) $y=-15x+145$ b) see attached image c) 8
a) You know they start off with 145 lbs of food on day 0. With every day that goes on, they have 15 lbs less food. Therefore, the y intercept is 145, and the slopes is -15. b) Graph the equation on graph paper c) go to 25 on the y axis in your graph and draw a horizontal line. You will find that it crosses $y=-15x+145$ at (8,25), so the x value is 8.