## Algebra: A Combined Approach (4th Edition)

a) $(0, 2130)$ and $(7,1850)$ b) $y=-40x+2130$ c) 1730 thousand barrels
a) $2000-2000 = 0$ $2007-2000 = 7$ 2000 had 2130 thousand barrels 2007 had 1850 thousand barrels b) $m=(2130-1850)/(0-7)$ $m = 280 / -7$ $m=-40$ $y=mx+b$ $2130 = -40*0+b$ $2130 = 0+b$ $2130 = b$ $y=-40x+2130$ c) $y=-40x+2130$ $2010-2000 = 10$ $y=-40x+2130$ $y=-40*10+2130$ $y= -400 + 2130$ $y=1730$