## Algebra 1

(5, .4) and (-1, -2) are given $m = (.4--2 )/(5--1)$ $m = 2.4/6$ $m = .4$ $y=mx+b$ $.4 = .4*5 + b$ $.4= 2 + b$ $.4 - 2 = 2+b - 2$ $-1.6 = b$ $y=.4x-1.6$ Let x = 0: $y=.4*0-1.6$ $y = -1.6$ Let y = 0 $0 = .4x - 1.6$ $0+1.6 = .4x - 1.6 + 1.6$ $1.6 = .4x$ $1.6/.4 = .4x/.4$ $4 = x$