URGENT
What is the general formula of the slope? I'm doubting, is y2-y1/x2-x1 or y=mx+b?

Pretty sure it’s y=mx+b

If you're looking for an even spread of clay, silt and sand, add a considerable amount of sand and some clay until the 3 even out". soil texture triangle. silty clay loam soil is approximately 20 percent or less sand, 25 to 40 percent clay, and 40 to 70 percent silt.