Question 15 (1 point) Martin walks 5 m toward a motion sensor over the course of 10 s, at a constant speed. What would be the slope of the segment representing this walk on a distance versus time graph? O - 2 O 2 02 Question 16 (1 point) Which of the following values for & is a counterexample to the claim that cos( x - @) = cos() is an identity? 3 x 2 O cos(xx- @) = cos(@) is an identity. Question 17 (1 point) Which is the best list of possible values of x that could make f(x) = 3x* + 6x3 + Ilx + 6 equal to O? +1, +2, +3, +6 O +1, +2, 15, 15, +7 +1, +2, +3, +6, +4, +2 0, +1, +2, 17, 15, 1;,+3