Question

For every 10m increas in depth water pressure increases by 100kPa. At a depth of 40 m the pressure is approx 500kPa

Write a linear equation

Answer 1

40m deep = 500 kPa.

+10m deep = +100 kPa

50m deep = 600 kPa

60m deep = 700 kPa

( It never stops ! )

Explantion:

The depth affects the entire water pressure, not the other way around, and thus the depth is a independant variable and the water pressure is most likely a dependant variable.

Fact:

100 kPa every 10 meters, or 10 kPa per meter.

0m deep = 100 kPa. Add 10 kPa for every meter. ( and so on )

kPa = 100 + (10x the depth in meters)

Using the variables given, p = 10d + 100.