MAT 250 Graded Midterm Exam (Straighterline)

What is the slope of the tangent line of the function f (x) = −4x − 5x + 2 at x? Select one: a. −8x − 5 b. −8x + 5 c. 8x − 5 d. 8x + 5 The correct answer is: −8x − 5 Select one: a. 1 b. −1 c. −2 d. 0 The correct answer is: −1 2 4/18/2018 Graded Midterm Exam Question 4 Correct 3.75 points out of 3.75 If the graph of the derivative of f(x) is shown, at which x-coordinates would f(x) have a point of inflection? Select one: a. x = q only b. x = q and x = s c. x = r and x = s d. x = p and x = s The correct answer is: x = q only 4/18/2018 Graded Midterm Exam Question 5 Correct 3.75 points out of 3.75 Question 6 Correct 3.75 points out of 3.75 Find all points on the curve ln (xy) = x where the tangent lines are vertical. Select one: a. None of the tangent lines are vertical. b. (0, 0) c. (0, 1) d. (1, 0) The correct answer is: None of the tangent lines are vertical. Select one: a. true b. false The correct answer is: true 2 4/18/2018 Graded Midterm Exam Question 7 Correct 3.75 points out of 3.75 Express time as a function of distance and rate. Select one: a. T = D R b. T = R D c. T = DR d. Time cannot be expressed in terms of distance and rate. The correct answer is: T = D R