Need -20pts- must show steps and how you did it

3. slope is 7  (slope = rise/run) count from the left most point to the other
     up 7 right 1 both positive so slope = 7/1 reduced is 7
4.  slope is 1/3 same process as above 
     up 1 right 3 both positive movement so slope is 1/3 
5.  y = 1/3x - 4    slope intercept form is y = (slope)x + (y-intercept)
     y-intercept is where the graph touches the y-axis
6.  y = 3x + 4