Question 21869
first you must find the slope
y2-y1
------  = m =slope  your points are 1=(2,3)and 2=(4,7) put these in the formula
x2-x1   

7-3
--- = 4/2=2  your slope is 2
4-2
         then you must use the point-slope equation y-y1=m(x-x1)

y-3=2(x-2)
y-2=2x-4
y=2x-2    this is y=mx+b form which is your slope intercept form