If a line y = 2x + 2 has x = 0, what is y?

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Multiple Choice

If a line y = 2x + 2 has x = 0, what is y?

Explanation:
Substitute the given x-value into the line’s equation y = 2x + 2. With x = 0, y = 2(0) + 2 = 2. This is the y-coordinate when x is 0, i.e., the line’s y-intercept at (0, 2). So the value is 2. The other numbers would come from different x-values—for example, y = 4 would require x = 1, y = 0 would require x = -1, and y = 6 would require x = 2.

Substitute the given x-value into the line’s equation y = 2x + 2. With x = 0, y = 2(0) + 2 = 2. This is the y-coordinate when x is 0, i.e., the line’s y-intercept at (0, 2). So the value is 2. The other numbers would come from different x-values—for example, y = 4 would require x = 1, y = 0 would require x = -1, and y = 6 would require x = 2.

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