ANSWER :
LQE stands for Linear, Quadratic and Exponential model
EXPLANATION :
L.Q.E. stands for Linear, Quadratic and Exponential models.
Basically, you need to identify the graph if is linear, quadratic or exponential.
The graph is linear if it is a straight line.
The graph is quadratic if it is in a shape of parabola.
The graph is exponential if one side of the graph is going upwards or downwards.