This question-specific review guide is tied to the answer reasoning for a PracticeTestVault item. Use it after you answer the question so the review stays focused on what the prompt actually tested.
What this question is testing
Objective: Evaluate a linear function.
Prompt focus: For f(x) = 7x + 8, what is f(9)?
Why the correct answer works
71
Substitute 9 for x: f(9) = 7(9) + 8 = 71.
Why the tempting wrong answer fails
The tempting wrong answer usually loses because it skips the key condition, priority, or evidence in the prompt.
Plain-language takeaway
The deciding step is to apply evaluate a linear function. to the facts given. Substitute 9 for x: f(9) = 7(9) + 8 = 71.
Simple analogy
Think of evaluate a linear function. like following a short checklist: identify the clue, confirm the rule, and then make the move that fits this exact scenario.
How to review it before a retake
- Underline the command word and name what the question is asking before rereading the choices.
- Compare the correct answer against the closest distractor and write the exact detail that separates them.
- Retest this objective with a fresh question without looking at the rationale first.