111.28.b.4.A
Subchapter B. 111.28 111.28.b 111.28.b.4 111.28.b.4.A
use similar right triangles to develop an understanding that slope, $m$, given as the rate comparing the change in $y$-values to the change in $x$-values, $(y_2 - y_1)/(x_2 - x_1)$, is the same for any two points $(x_1, y_1)$ and $(x_2, y_2)$ on the same line;
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