Math Quiz -Graphs/Charts Report a question What's wrong with this question? You cannot submit an empty report. Please add some details. Math Quiz -Graphs/Charts 1 / 5 1. The graph of the function f is shown. Which of the following is a value of x for which f(x) = 0 ? a) -1 b) 0 c) 1 d) 4 The function f(x) = 0 when the graph of the function intersects the x-axis. The graph of f(x) intersects the x-axis at x = 1. So the answer is C. 1. 2 / 5 2. The function f models Jack's pulse, in beats per minute (bpm), as a function of his speed, in kilometers per hour (km/h), on a stationary bicycle. Based on the model, what was Jack's pulse, in bpm, when his speed was 0 km/h? a) 4 b) 15 c) 63 d) 123 The graph shows that the function f intercepts the y-axis at 63. This means that when Jack's speed is 0 km/h, his pulse is 63 beats per minute. So the answer is C. 63. 3 / 5 3. The scatterplot shows the total number of home runs hit in major league baseball, in ten-year intervals, for selected years. The line of best fit for the data is also shown. Which of the following is closest to the difference between the actual number of home runs and the number predicted by the line of best fit in 2003? a) 250 b) 500 c) 750 d) 850 The scatterplot shows that the actual number of home runs hit in 2003 was approximately 3600. The line of best fit predicts that the number of home runs hit in 2003 should have been approximately 2850. Therefore, the difference between the actual number of home runs and the number predicted by the line of best fit in 2003 is approximately 3600 - 2850 = 750. So the answer is C. 750 4 / 5 4. What is the slope of the line graphed in the xy-plane? a) -1 b) 3/2 c) 1 d) 2/3 The graph shows a line that passes through the points (0, 0) and (4, 6). The slope of the line is: m = (y2 - y1) / (x2 - x1) = (6 - 0) / (4 - 0) = 3/2 Therefore, the answer is B. 5 / 5 5. The scatterplot above shows the average fuel economy for a certain class of car driven at 12 different speeds. The graph of a quadratic model for the data is also shown. For what fraction of the 12 speeds does the model overestimate the average fuel economy? Check he model overestimates the average fuel economy for the speeds between 15 and 35 miles per hour. There are 4 speeds in this range, so the model overestimates the average fuel economy for 4/12 = 1/3 of the speeds. Your score is 0%