{"id":"act_practice_pdf:pt2:math:045","source_id":"act_practice_pdf","source_item_id":"pt2-math-045","external_id":null,"program":"ACT","section":"math","category_code":"PHM","category":"Preparing for Higher Math","subcategory_code":"F","subcategory":"Functions","form_id":"act_practice_pdf:pt2","passage_id":null,"position":45,"scored":true,"layout_warning":"Stacked notation (fractions, radicals, matrices) does not survive text extraction. The image above is the question as printed; the text below it is approximate.","stem":"Given that f (x) = √ 2x − 1 , which of the following −1 expressions is the inverse function, f (x) ? _ 1","stimulus":"","stimulus_html":"<figure><img src=\"/api/assets/11cb7c2f25b1f64987377475161ac4964765c3a8b54de0966e405b2da7518a9d\" alt=\"Question 45 as printed in the ACT Practice Test 2 booklet\"><figcaption>As printed in the official booklet.</figcaption></figure>","stem_html":"<p>Given that f (x) = √ 2x − 1 , which of the following −1 expressions is the inverse function, f (x) ? _ 1</p>","rationale_html":null,"correct_answer":["C"],"equiv_key":"c8a2ceeee58e378ed4b4155d","has_media":true,"has_mathml":false,"has_table":false,"section_label":"Mathematics","options":[{"label":"A","content_html":"<p>_ √ 2x − 1 _ 3 x + 1 √ _</p>","ord":0},{"label":"B","content_html":"<p>_ x + 1</p>","ord":1},{"label":"C","content_html":"<p></p>","ord":2},{"label":"D","content_html":"<p>(2x − 1) STOP! DO</p>","ord":3}],"passage":null,"attribution":{"source_id":"act_practice_pdf","source_name":"Official ACT full-length practice tests (PDF)","rights_holder":"ACT Education Corp.","canonical_url":"https://www.act.org/content/act/en/products-and-services/the-act/test-preparation.html","retrieved_from":"https://www.act.org/content/act/en/products-and-services/the-act/test-preparation.html","attribution":"Full-length ACT practice tests © ACT Education Corp., published free at act.org. Questions are retired items from previous ACT administrations.","disclaimer":"Extracted from a print-layout PDF: equations, figures and charts do not survive as text. Use the original PDF for anything that renders poorly. ACT® is a registered trademark of ACT Education Corp., which is not affiliated with, does not sponsor, and does not endorse this project.","license":"ACT Education Corp. copyright. Published free for personal test preparation; not licensed for redistribution.","redistributable":false,"item_count":342},"equivalents":[]}