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Mathematics 8 Online
OpenStudy (anonymous):

HI GUYS PLEASE HELP ME!! WILL GIVE MEDAL AT END please give a proportional and non proportional situation example

OpenStudy (anonymous):

@lupita1995

OpenStudy (anonymous):

@midhun.madhu1987

OpenStudy (anonymous):

Gasoline cost $4.24 per gallon. We can start by creating a table to show how these two quantities, gallons of gas and cost, vary. Two things show us that this is definitely a proportional relationship. First, it contains the origin, (0, 0), and this makes sense: if we buy zero gallons of gas it will cost zero dollars. Second, if the number of gallons is doubled, the cost is doubled; if it is tripled, the cost is tripled. The equation that will represent this data is y = 4.24x , where x is the number of gallons of gasoline and y is the total cost. The graph is shown below. Note: The equation does extend into the third quadrant because this region does not make sense for the situation. We will not buy negative quantities of gasoline, nor pay for it with negative dollars! There are different ways to determine the slope of this line. First, we reasoned what the slope was when we determined the equation of the line: for each gallon of gas the cost increases $4.24. Also, we can find the slope by creating a “slope triangle” which represents rise run . In the slope triangle drawn at right, the “rise,” or vertical change, is 4.24 while the “run,” or horizontal change, is 1. Therefore the slope is 4.24 1 = 4.24 . Either way, the constant of proportionality is the slope, which is 4.24.

OpenStudy (midhun.madhu1987):

A quantity P is said to be in proportion to Q if an increase in P is associated with increase in Q - This is called DIRECT PROPORTION

OpenStudy (midhun.madhu1987):

OR A quantity P is said to be in proportion to Q if an decrease in P is associated with decrease in Q - This is called DIRECT PROPORTION

OpenStudy (midhun.madhu1987):

A quantity P is said to be in proportion to Q if an increase in P is associated with decrease in Q - This is called INVERSE PROPORTION

OpenStudy (midhun.madhu1987):

What is the relation between demand and supply? if demand increases... what happens to supply?

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