Question

what does this sign is called and what does it mean ​

Answer 1

Answer:

this sign is called ( directly proportional sign )

for example , we say work ∝ force

so we mean that work is directly proportional to force.

Answer 2

Answer:

This sign stands for "is proportional to" .

They are also mentioned as directly proportional or inversely proportional .

This symbol is used to denote proportionality.