Answer:
The ratio will fall.
Explanation:
This is a marginal utility question.
Consumers usually spent their income so as to maximize the utility driven from consumption of products.
In case of X and Y, a consumer will spend and allocate their income such that every last Dollar spent on each product yields the same utility so,
MU of X / P of X = MU of Y / P of Y
where MU = marginal utility and P = price.
So when the price of X rises, the ratio of MU/ P of X falls.
This will call for a reallocation of income to again be able to maximize the utility.
Hope that helps.
