Question

# The pollution level in the centre of a city at 6 am is 30 ppm (parts per million) and it grows in a linear fashion by 25 ppm (parts per million) every hour. If y is pollution and t is the time elapsed after 6 am, then determine the function that relates y with t .

Hint:

### To form of function we will use the pollution at 6 am & the constant increase in the pollution .

## The correct answer is:

### STEP BY STEP SOLUTION

The pollution level at 6am = 30ppm

It grows per hour = 25ppm

y= pollution & t = time

The function that relates y with t.

y = pollution level at 6am + It grows pr hour Time

y= 30 + 25t

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