A, first find the slope of the line shown, which is 2x+1
slope is rise/over run, with the y-intercept being on 1
When looking at rate of change, it's really just telling you to look at the slope and how steep it is. The more steeper it is, the higher the rate of change. (as close as it is to being a vertical line). Since the slope here is 2. Look for one that has a slope greater than 2, which is 3. Therefore the answer
A. 3x-1
Hope this helps!