What is the opposite expression for the one provided? -10t+21

  ←←←←←←←←Ö
    |    |   |    |    |   |    |    |    |    |   |   |   |   |   |   |   |   |   |   |    | 
-10  -9 -8 -7 -6 -5  -4  -3  -2 -1  0  1  2  3  4  5  6  7  8  9  10 

This is how I understand the word problem.

Since the circle above -4 is an open circle, it means that y is not equal to -4.

Since the arrow is going to the left of -4, the numbers are all less than -4.

y < -4

Among the choices, D. y + 3 < -1 is the correct answer.

y + 3 < -1
   -3      -3
y       < -4