📈∪/📉∩

#concave up #concave down #curve shape #function graph #mathematical symbols #calculus curves #convexity

〽️🏹

#curve shape #wavy bow #bow shape #part alternation mark #downward curve bow

↔️C

#sideways c #horizontal c #curve shape #letter c shape #parenthesis resemblance #bidirectional c

〰️📉📈

#sech graph #function plot #curve shape #hyperbolic secant graph #math visualization