The Heat index is a function of temperature and relative humidity and is represented as .

Estimate .

.

Assume values depending on Table 1.

Let .

From Table 1: and .

For , .

Let .

From Table 1: and .

For , .

Therefore, the average of the two values is .

.

The rate of change in temperature with constant humidity, increases the heat index by .

Estimate .

.

Assume values depending on Table 1.

Let .

From Table 1: and .

For , .

Let .

From Table 1: and .

For , .

Therefore, the average of the two values is .

.

The rate of change in humidity with constant temperature, increases the heat index by .

and .