Question

The table indicates the number of cases of West Nile Virus over a period of 4 month. Find the rate of change between months 1 and 2 & 2 and 4

Answer 1

#Month 1 and 2

• (1,22)
• (2,34)

$\\ \tt\hookrightarrow m=\dfrac{32-22}{2-1}=12$

#Month 2 and 4

• (2,34)
• (4,16)

$\\ \tt\hookrightarrow \dfrac{16-34}{4-2}=-18/2=-9$