Natasha rides her bicycle to school. She rides slowly uphill for 5 minutes, and then speeds up for 1 minute until she reaches the top of the hill. Then she rides at a consistent speed on a flat road for 15 minutes. The last 2 minutes of her ride, Natasha rides back downhill until she arrives at school. Which graph shows the behavior of the bike ride over time?
A line graph plotted in the first quadrant of a coordinate plane. The horizontal axis is labeled time, and the vertical axis is labeled elevation. The graph consists of 3 connected line segments. The first segment begins at the origin and rises from left to right, the second segment is horizontal, and the third segment falls from left to right back to the horizontal axis. A line graph plotted in the first quadrant of a coordinate plane. The horizontal axis is labeled time, and the vertical axis is labeled elevation. The graph consists of 5 connected line segments. The first segment begins at the origin and rises from left to right, the second segment also rises from left to right, but at a steeper slope, the third segment is horizontal, the fourth segment rises from left to right, and the fifth segment falls from left to right back to the horizontal axis. A line graph plotted in the first quadrant of a coordinate plane. The horizontal axis is labeled time, and the vertical axis is labeled elevation. The graph consists of 4 connected line segments. The first segment begins at the origin and rises from left to right, the second segment also rises from left to right, but at a steeper slope, the third segment is horizontal, and the fourth segment falls from left to right back to the horizontal axis. A line graph plotted in the first quadrant of a coordinate plane. The horizontal axis is labeled time, and the vertical axis is labeled elevation. The graph consists of 4 connected line segments. The first segment begins high on the Y-axis and falls from left to right, the second segment rises from left to right, the third segment is horizontal, and the fourth segment falls from left to right back to the horizontal axis.