Answer:The slope is defined as the ratio of the vertical change between two points, the rise, to the horizontal change between the same two points, the run. The slope of a line is usually represented by the letter m. (x1, y1) represents the first point whereas (x2, y2) represents the second point.
The 'perfect square' method is basically saying that see if the number inside the square root is a factor of a perfect square (4, 9, 16, 25, etc). But, square root of 22 is not a factor of one of these, so you just have to approximate this. We known that square root of 25 is 5, and 16 is 4. This has to be between 4 and 5 and a little bit more to the 5 side. So, we can approximately say that:
Hope this helps!
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