Question

Which logarithmic graph can be used to approximate the value of y in the equation 2y = 5?

Answer 1

\(y = 2.5\)

or do you mean

\(2^y = 5\) ??!!

Answer 2

2^y=5. the second thing you said

Answer 3

if you start with 2^y= x
then
y log(2)= log(x)
y= log(x)/log(2)

the graph of this should look something like