{"id":"cb_practice_pdf:t6-math-m2-q1","source_id":"cb_practice_pdf","source_item_id":"t6-math-m2-q1","external_id":null,"ibn":null,"question_id":null,"program":"SAT","module":"math","domain_code":null,"domain":null,"skill_code":null,"skill":null,"difficulty":null,"score_band":null,"answer_type":"mcq","answer_source":"rationale","layout_warning":null,"form_id":"cb_practice_pdf:test-6","module_number":2,"position":1,"stem":"- - - -_defined_by - - -_=_8x -_._For_what - ~ The function f is f x = 72 value of x does f x?","stimulus":"","stimulus_html":null,"stem_html":"<p>- - - -_defined_by - - -_=_8x -_._For_what - ~ The function f is f x = 72 value of x does f x?</p>","rationale_html":"<p>72 72=8 Choice B is correct. Substituting for f^xh in the given function yields x. = =72 Dividing each side of this equation by 8 yields 9 x. Therefore, f^xh when the value of x is 9. =64 =72 Choice A is incorrect. This is the value of x for which f^xh , not f^xh . =512 =72 Choice C is incorrect. This is the value of x for which f^xh , not f^xh . =640 =72 Choice D is incorrect. This is the value of x for which f^xh , not f^xh .</p>","correct_answer":["B"],"has_media":false,"has_mathml":false,"has_table":false,"source_created_at":null,"source_updated_at":null,"options":[{"label":"A","content_html":"<p>8</p>","ord":0},{"label":"B","content_html":"<p>9</p>","ord":1},{"label":"C","content_html":"<p>64</p>","ord":2},{"label":"D","content_html":"<p>80</p>","ord":3}],"attribution":{"source_id":"cb_practice_pdf","source_name":"College Board full-length SAT practice tests (PDF)","rights_holder":"College Board","canonical_url":"https://satsuite.collegeboard.org/practice/practice-tests/paper","retrieved_from":"https://satsuite.collegeboard.org/practice/practice-tests/paper","attribution":"Full-length SAT practice tests 4–11 © College Board, published free at satsuite.collegeboard.org.","disclaimer":"Extracted from PDF layout: equations, figures and tables do not survive intact. Use the original PDFs for anything the text renders poorly. SAT® is a trademark registered by the College Board, which is not affiliated with and does not endorse this project.","license":"College Board copyright. Free to download; not licensed for redistribution.","redistributable":false,"item_count":905}}