Psi stands for pounds per square-inch.
It is a measure of pressure, and is the equivalent pressure of putting one pound on a square-inch of area.
For example, someone weighing 180 pounds standing on his feet, with a footprint area of 72 square-inches would exert a pressure of 180 pounds/72 square inches = 2.5 pounds per square-inch, or 2.5 psi.
Answer: shade too the left
Step-by-step explanation: i don't know what closed point is but if you use something called desmos then press start graphing and put in that equation it will give you the graph you need