Question

There are 10 birds in a tree. For every minute, 2 birds fly away from the tree. The relation between the number of birds and the time is given. How many birds will be there after 3 minutes?

• A. 4
• B. 6
• C. 8
• D. 2

Answer 1

The correct option is A 4

Time is represented on the x-axis.

Number of birds is representd on the y-axis.

From the graph, we observe that,
when time = 1 minute, number of birds = 8

When time = 2 minutes, number of birds = 6

Hence, the relation between the number of birds and time is

n = 10 - 2t

Hence, number of birds after 3 minutes = 10 - 2(3) = 4