IGCSE MATHS Doubts

[Fastal]

Its clearly shear .. y axis invariant line .. im a lil confused about factor .. i think its 0.5 .. check in the ms ..

how do you know about invariant line?

[Vin]

the image always moves perpendicular to the invariant .. here the image moves to the right if u turn the page 90^o aticlockwise u can see the image has moved exactly upwards or perpendicular ..

[Ghost Of Highbury]

i thought it was x-axis invariant line ...

[Vin]

i think its x axis .. ya ur right .. always get confused with such kinda sums ..!! can u tell me how can u be sure wid the invariant line ??

[Ghost Of Highbury]

im confused abt it too, i know its something parallel to x-axis or the x-axis...x-axis because the point parallel to it dont change in shape, or move...

@astar - answer this doubt, it can be anything parallel to x-axis rite? but if it is , v'll get different shear factors..plz help.

[astarmathsandphysics]

If someone tells me where I can find a question for invariant lines I will do a page on my website

[Fastal]

@ astar
2005 june 3(a)(iv) paper 4 IGCSE

im confused abt it too, i know its something parallel to x-axis or the x-axis...x-axis because the point parallel to it dont change in shape, or move...

@astar - answer this doubt, it can be anything parallel to x-axis rite? but if it is , v'll get different shear factors..plz help.

exactly, you would get different shear factors

[Fastal]

i think this is how you do it, BUT what if there was no x and y axis in the graph.

[Ghost Of Highbury]

i think this is how you do it, BUT what if there was no x and y axis in the graph.

Yes it can be done in the matrix form.

And a graph doesn't exist without the axes. Cartesian plane, rather.

[PeaceMaker]

Damn, i feel very stressed. As the math exam come closer i keep making silly mistakes, cant focus on physics and im really worried i hope the curve is low.

[Vin]

Dont worry everything will be fine .. 

[PeaceMaker]

I hope so. Well, i tend not to worry and stressed out as i always know there is a second chance if i really messed up but, i tend not to put second chance as an option because i just want to finish with it as soon as possible. But oh well, here's hoping everything goes smoothly. I guess i better focus on physics now since its after tomorrow.

[Fastal]

paper 4 09 nov, 2(a)(iv)

why is the scale factor -ve???
i know this was discussesd before and someone said it moved left, but its moving right here, right?

[Ghost Of Highbury]

its vertically left.

[thenewkid™]

i think its 1 because the point moves 4 points to the right frm its original place and is 3 points away frm the invariant line