If we have a given physical resistor, and we want to double the current through it, we do that by doubling the voltage across it. The resistance, at least ideally, stays the same.
In the real world, the resistor value will change somewhat due to the temperature of the part rising. Maybe a few 10's of ppm for a high quality resistor, or several per cent if we deliberately choose a resistor material with high thermal coefficient of resistance (TCR).
If we had a fixed voltage source and wanted to choose a different resistor that would allow twice the current through, then we'd choose one with half the resistance value. If you had this in mind, then you've answered the question correctly, you've just misunderstood what question the instructor wanted to ask (because their wording was ambiguous).