Which values of x and y are solutions to the open sentence? 5y ≥ 3x + 4

All the x, y values on or "above" the line

Note that the equation shown, -1.2x + 2y = 1.6, can be transformed into yours

Multiply everything by 2.5

-3x + 5y = 4     Rearrange

5y = 3x + 4

But, since all the points we're interested in lie on or above the line, we have

5y ≥ 3x + 4   

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Thanks Chris - as Chris has said

It is the line and everything above the line