A relation is a function when 2 or more of the domain are the same, if none are the same then it is a function.
Because you wont add the wrong nubers together because 1/10 is .1 and 1/100 is .01
I think it’s perpendicular, I tried to do a quick drawing, sorry if it’s not perfect ☹️
Answer:
1
Step-by-step explanation:
it can be the rational number