Option 1 is a suitable graph for a “constant positive velocity”.
Option: 1
Step-by-step explanation:
Consider a car is moving with the constant velocity, the position and time graph with “constant positive velocity” of the car is represented by the graph which is in option 1. In this graph (option: 1) has the straight line with the slope. The slope in this “position - time” graph represents the “speed of the car”, the velocity is positive hence the graph is drawn positive direction. Here, the “slope of the car” less so the car moves with less speed and constant positive velocity.