Which equation matches the graph of the greatest integer function given below?i inserted a picture of the question, please give a VERY SHORT explanation.

ANSWER
D. y = [x] - 2
EXPLANATION
In the graph, we can see that when x = 2 unitl x = 3, the value of the function is 0. Hence, the value of the function is given by the value of x minus 2. The equation is y = [x] - 2.