Evaluate f(x) = -3x + 7 when x = 4.

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Prepare for the 8th Grade FAST Mathematics Test with our Pre-Algebra quiz. Study with multiple choice questions, each with hints and explanations. Build your confidence and ensure you're ready to excel!

Multiple Choice

Evaluate f(x) = -3x + 7 when x = 4.

Explanation:
Evaluating a linear expression at a specific value means replacing the variable with that value and following the order of operations. For f(x) = -3x + 7, substitute x with 4: f(4) = -3(4) + 7. First multiply: -3 × 4 = -12. Then add 7: -12 + 7 = -5. So the function value at x = 4 is -5. This also aligns with the idea that as x increases, the line slopes downward (negative slope), and at x = 0 the value is 7, so at x = 4 it makes sense to be -5.

Evaluating a linear expression at a specific value means replacing the variable with that value and following the order of operations. For f(x) = -3x + 7, substitute x with 4: f(4) = -3(4) + 7. First multiply: -3 × 4 = -12. Then add 7: -12 + 7 = -5. So the function value at x = 4 is -5. This also aligns with the idea that as x increases, the line slopes downward (negative slope), and at x = 0 the value is 7, so at x = 4 it makes sense to be -5.

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