The given equation is:
y = 3t + 6
This equation represents the distance traveled by ant in t minutes. Here 3 is the slope of the line. Slope of a distance-time graph gives the speed. Also consider the units. Units of slope will be (unit of distance/unit of time) = feet / minute
Feet per minute gives the velocity or speed.So the correct answer to this question is Option B. Ant is crawling at 3 feet per minute