50=(2,3)
(4,5)=90
(4,6)=100
(3,8)=?

110

Step-by-step explanation:

They’re adding the two numbers and putting zero at the end

assuming you mean addition: addition and subtraction are reverse operations.

step-by-step explanation:

(1,4) is on graph of f(x)

f(1) = 4

so 1/4 f(x)

1/4 f(1)

1/4. ×4

1

so point for function 1/4. f(x) is (1,1)