Answer:
It is Linear Increasing.
Explanation:
If it is a straight line, it is a linear function. if it is NOT a straight line, then it is a non-linear function.
Edit: When the line starts from the top of the y-axis, then it is decreasing. If the line starts from the Origin Point (as shown in the picture you included), then it is increasing. I hope this helps you in Linear and Non-linear relationships.