Part of this question was typeset outside the text flow — a fraction, subscript or similar — and PDF extraction re-inserted it in the wrong place. The wording is reliable; the symbols may be out of order. Check the original PDF →
1= I " \ I ' OJ) "a> 10::r:: \ X () 12345678910 Time (seconds) An object was launched upward from a platform. The graph shown models the height above ground, y, in meters, of the object x seconds after it was launched. For which of the following intervals of time was the height of the object increasing for the entire interval? = 0 = 2
Correct answer: 5 (parsed from the explanation — this source omits an answer key for this item)
Explanation
189 The correct answer is 5 . A y-intercept of a graph in the xy-plane is a point where the graph intersects the y-axis, which is a point with an x-coordinate of 0. Substituting 0 for x in the given equation yields 3 ^7 0 h=- 5 9 y+21 , or 0=- 5 9 y+21 . 21 -21=- 5 y Subtracting from both sides of this equation yields 9. Multiplying - 189=5 both sides of this equation by 9 yields y. Dividing both sides of this 189 = equation by 5 yields 5 y. Therefore, the y-coordinate of the y-intercept of the 189 graph of the given equation in the xy-plane is 5 . Note that 189/5 and 37.8 are examples of ways to enter a correct answer.
Loading…
Searched on YouTube by topic, not by question text. Open this search on YouTube →
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.