Nathan left his house at time zero and drove to the store, which is 10 blocks away, at a speed of 5 blocks per minute. Then he stopped and went into the store for 6 minutes. From there, he drove in the same direction at a speed of 3 blocks per minute until he got to the bank, which is 6 blocks away from the store. He stopped at the bank for 7 minutes. Then he drove home at a speed of 2 blocks every minute. Make a graph of showing the number of blocks away from home that Nathan is xx minutes after he leaves his house, until he gets back home.