Just like we did yesterday, we can use matrices to help us solve scale change problems. It’s actually very simple!
We symbolize the fact that we’re representing a scale change when we write this:
Sa,b
In this case, the a and the b function as the x,y coordinates on a graph. So if we’re trying to find the scale change of a triangle by 4 times horizantilay and 2 times vertically. The equation for the triangle would look something like this:
[a 0] [ x1 x2 x3]
×
[0 b] [ y1 y2 y3]
All you have to do is plug in the numbers and multiply!
The Blogger 
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