Some Questions:The rate of filling an empty container with water is 10m per minute. It takes 5 minutes to fill it till the top.

•Draw a graph showing the relationship of the volume of water and the time.•What relation does your graph depict?

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• Deduce the relation between the height(of the empty container) and the time by plotting a graph. (Assuming that it is being constantly filed with water a rate such that 1 cm of the cylinder’s depth is filled in 1 minute)

• Give them an overview of direct proportion by picking up any formula; such as V=IR, justify the fact that since it has a direct relationship therefore, it ought to have a graph of y=mx. Where R and m are interchangeable.

Direct proportionActual graph made using measurements. Ideal scenario

Boyle’s Law?

• This is a gas law that relates the volume of a gas to the pressure. We find that the pressure produced by a fixed mass of gas increases as the volume decreases. The gas is held at a constant temperature. More precisely, we find that:

• pressure is inversely proportional to the volume• in symbols Pressure 0C 1/volume

Hence Graphically

Inverse Relationship

• All you need to know about calibration Curves:

An overview of Calibration Curves:• In order to find the unknown quantity you need to plot the graphs between

two of the known quantities.

• Then you can obtain information such as its gradient, y-intercept, etc.

• What does the word calibration mean?

• To divide linear distance into chunks; Recall that we used this term in instruments when we discussed how wooden bars were calibrated to form rulers.

• Now lets put the two words together and realize what they mean. When you are given a scenario with a vague idea of the limits only, then using these limits you can calibrate the two quantities on the two axis of a graph and ultimately plot a curve.

Resultant Vector