[8th Grade Math] Why you can do the basics of linear functions but get stuck on application problems

"I can solve problems where I substitute numbers into an equation, but I don't understand when it becomes a graph." "I ...
Ars Technica

The Big PIcture of Linear Algebra

This is a subject I struggled with the first time I took it. Ironically, this was the engineering version of it. It wasn't until I took the rigorous, axiomatic version that everything clicked.