Tom spent part of his morning visiting and playing with friends. The graph shows his travels. He went to his friends' houses and stopped to play if they were at home. The number of houses at which he stopped to play is
(A) 1
(B) 2
(C) 3
(D) 4
(E) 5

![](https://cdn.mathpix.com/cropped/2024_04_20_6027bc27089ed4fc493cg-099.jpg?height=401&width=856&top_left_y=1767&top_left_x=602)
Tom spent part of his morning visiting and playing with friends. The graph shows his travels. He went to his friends' houses and stopped to play if they were at home. The number of houses at which he stopped to play is
(A) 1
(B) 2
(C) 3
(D) 4
(E) 5

![](https://cdn.mathpix.com/cropped/2024_04_20_748fdafcde2a47412608g-448.jpg?height=475&width=1014&top_left_y=2023&top_left_x=553)

## Solution

From the graph, we can see that Tom stops at two houses in his travels. Notice that his first visit to a house, illustrated by the 'triangular' shape implies that his friend was not at home.

During his other two visits, the horizontal line indicates the fact that Tom stayed.

In both instances, Tom stayed for about 30 minutes.

ANSWER: (B)