English Logaritm 5

In order to find out the invers function of this particular function, we have to interchange the variabel x and y. So, I will write down x, the replace of y and this will be five times in variabel x I will write y, minus three. There are two become function, that one is invers of the other. Another to properly represent text, we have to rearrange the terms. So, I go to send three to this side, x plus three and there will becomes five y. And then, just keep y on one side. We can have one fifth of x plus three. Now, in the question, you have been ask f invers of one. So, I want to replace x by one, there will become one fifth of three plus one. So, f  invers of one will become four fifth or zero point eight.

So, the correct answer will be option D.