Thursday, 17 April 2014

How are these scenarios represented in Graphs?

For this activity (in Study Notes, p10), you are required to sketch the graph, based on the "dependent" and "independent" variables given [The order matters!]






Below are the 'graphs' presented by the various groups - something to PONDER


Question 1: Money put in the vending machine vs the number of bottles of drinks dispense by the machine.
Point to Ponder
Imagine that one bottle of fruit juice costs $1. When we insert $3, we should get 3 bottles of drinks.
What the graph suggested is, if we insert $2.50, we should get 2.5 bottles of drinks.
How would you modify the graph so that it is relevant to the context?




Question 2: Time taken to travel vs distance covered by the car travelling at constant speed
Point to Ponder
When we do not mark the axis, it's assumed that the point where the 2 axes meet is the origin (0, 0).
What the graph suggested is, right at the start, the car is already moving at constant speed (starting from stationary state). Do you think it's possible? What "change" do we need to take into account?




Question 3: Your height vs your age
Point to Ponder
Similar to Q2, when we do not mark the axes, it's assumed that the point where the 2 axes meet is the origin (0, 0).
Now, age 'starts' only at the point when you are born. So, what did the graph here suggest?
Next, recall how your height changes as you become older. In addition, do you think that your height will remain constant over time? 








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