Tips on Graphs
Wednesday, 9 September 2009
Dear 1E2,
Hope your holidays are ok so far. Thanks a million to reporter Yan Lin for helping me post up the links for the class to access.
Ain: If you are reading, you did the wrong question.I need you to complete Ex 12.2 Q4,5,6 not Ex 12.1. Remember to submit when school start. Take note of the following pointers below too.
All students, Just a few reminders on graphs:
(1)
Please state scale for both axis:
eg. x- axis : __cm = __ units
y- axis: __ cm = ___ units
(2)
I want to see the label of the Y-axis as Y and X-axis as X beside your arrows.
(3) When they tell you the criteria of plotting a straight line graph e.g Plot the graph of y=2x + 3 from x=-1 to x=4,
remember your axis will be from x=-1 to 4. And when you plot the graph, you must extend your graph to x=-1 and 4 even if they are not the points you chose from your table of values.
You do not exceed your line out of the range of x=-1 and x =4.You will stop drawing your line once it is along the x=-1 and 4 range.
(4)
Some of you do not understand the question for Ex 12.3 for example, Q5 ask u to plot pt A, B and C then join them up to form a triangle. After that you got to find the gradient for all the 3sides of triangle. Meaning, I should see gradient of line AB = xxxx (working and ans) and gradient of line BC and AC using the same method. Hope this will help you out to get started as Q6 and 7 are similar just with more lines.
(5) Q9 requires addition stuff: table of values to plot your graph and the labelling of the graph equation.
Have a good holiday yes...with work to do,but privilege of waking up later in the day! =)
Love,
Ms Shang


