Answer: Smaller.
Explanation: A gentle slope is smaller.
The slope defines the rate of change of how a variable Y changes linearly with other variable X. If the slope is big, this means that an small chance in one variable X has a big impact on the variable Y, this is a steep slope.
The case for the gentle one is the oposite, a big change in the variable X has a small impact in the variable Y, yhis means that the slope is smaller.