3) joseph travelled from his home to his friend’s house 15 km away. joseph stayed for some time and then returns home? just check if i answer it right? if i got one wrong explain why it wrong?

Yes, it is right.

a) 14:10

b) 10 km

c) 20 minutes

d) 30 km

Step-by-step explanation:

a) When Joseph left home, the distance is 0 km. So, the first point when the distance is 0 km is located at 14:10 on the x-axis.

b) You must find the intersection of 14:30  (x-axis) with the line. If you draw a segment from 14:30 to that intersection, you will see that the coordinate in "y" is  10 km.

c) You know that his friend’s house 15 km away from his home, therefore, the time Joseph spent at his friend's house is represented with the horizontal line, which goes from 14:40 to 15:00, so he spent 20 minutes.

d) As you can see in the graph, he travels 15 km to his friend's house and he returns home  after being at his friend's house. So, you must multiply 15 km by 2.