write the equation of a line, given the slope and y-intercept:
1. slope=1, y intercept (0.1) =
2. slope= -3, y intercept (0,-2/5) =
3. slope = 3/4, y intercept (0,2) =
slope = -1/5, y intercept (0,1) =
the slope intercept form of linear function is y=mx+b
so in number 1 ,slope =1,so m=1 ,y=x+b,Then plug in (0,1）(x=0,y=1），1=0*1+b,b=1,so the equation of number 1 is y=x+1
2. y=-3x-2/5
3 y=3x/4+2
4 y=-1x/5+1
