Guided Practice ..NVM I found the answer..

The correct answers for this question have been highlighted and are A.
horizontal; for all values of x, y = –1

Tell whether the graph of the equation is a horizontal or a vertical line. Explain your choice.

y = –1

Student Selected Correct
A.
horizontal; for all values of x, y = –1

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B.
vertical; for all values of y, x = –1

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C.
horizontal; for all values of x, y = 0

Check Answer
0x + 1y = –1

For all values of x, y = –1, so its graph is a horizontal line.