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

a) $(0, 302)$ and $(4,322)$ b) $y=5x+302$ c) 312 million subscriptions
a) $2003-2003 = 0$ $2007-2003 = 4$ 2003 had 302 million subscriptions 2007 had 322 million subscriptions b) $m= (322-302)/(4-0)$ $m = 20/4$ $m=5$ $y=mx+b$ $y=5x+b$ $302 = 5*0+ b$ $302 = 0+b$ $302 = b$ $y=5x+302$ c) $y=5x+302$ $2005-2003 = 2$ $y=5x+302$ $y=5*2+302$ $y=10+302$ $y=312$