I've also discovered how to use Desmos to graph parametric equations, and produced this pretty heart graph:
Happy Valentine's Day!
P.S. As it's half term, I'm going to give #teacher5adaysketch a go - so next week's blogs are mostly going to be my poor attempts at drawing!
(Image credit: By Farrah Zakir - Own work, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=46011611)