If y = -x + 1, what is y when x = 4?

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Multiple Choice

If y = -x + 1, what is y when x = 4?

Explanation:
Evaluating a linear function by substitution means plug in the given x value into the expression and simplify. For y = -x + 1, with x = 4, y = -4 + 1 = -3. So the y-value is -3. This shows the effect of the negative slope: increasing x decreases y, and substituting 4 moves the value from 1 down by 4 to -3. The other numbers would come from different x-values, not from x = 4.

Evaluating a linear function by substitution means plug in the given x value into the expression and simplify. For y = -x + 1, with x = 4, y = -4 + 1 = -3. So the y-value is -3. This shows the effect of the negative slope: increasing x decreases y, and substituting 4 moves the value from 1 down by 4 to -3. The other numbers would come from different x-values, not from x = 4.

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