Question

Sorry it doesn’t go bigger but please help.

Sand spills out a hole in a sandbag at a constant rate. The graph and table show how the weight of the sandbag changes with time

Which function models this situation?

Answer 1

B. a(n) = 42- (n-1) x 2

Explanation:

Just did the work on paper, I might not write that down but here's the late answer to your question.

Answer 2

This is an arithmetic sequence (graph is a line), so function:

a(n) = First term + (n-1) * Common Difference

Here First term = 42 and Common difference = 34 - 36 = -2 so


`a(n)=42+(n-1)\cdot(-2)\\\\\boxed{a(n)=42-(n-1)\cdot2}`

Answer B.