Based on your question if you break it down, it's increasing by 3 so thats how you get the slope. the chart shows as -2, 2, and 6 , but if you were ot make it like -2, -1, 0 , 1 ,2, 3, 4, 6, the y that corresponds with the x would increase by 3. the 4 is the y intercept, which means when x is 0, y equals 4