We are given a function

Here , b remains same and 'a' is increased by 2
Domain:
We know that domain is all possible values of x for which any function is defined
a is increased by 2
so, we get new function as

We can choose any value of 'x'
and it does depend on 'a'
so, domain will remain same
Range:
We know that range is all possible values of y
'a' is increased by 2 and b is constant
so, new function is

It will slightly increase y-value
but it will also be same
so, range will remain same...........Answer