checkpooint 3: completed scatterplot

I think i am used to bottom-up problem solving. I like doing problems by first utilizing the knowledge I
already have and expanding it. Top-down thinking, like we did in checkpoint 1 may sometimes make it difficult to
proceed once you get stuck in a step. For bottom up, you can move onto a different part which you already know.

transform.py

@@ -40,9 +40,9 @@ def clamp(value, low, high):
     val= None
     if value > low and value < high:
         val= value
-    if value < low:
+    if value <= low:
         val = low
-    if value > high:
+    if value >= high:
         val= high
     return val