Answer:
3 variables.
Step-by-step explanation:
b, c, and m are all variables.
Answer:

Step-by-step explanation:
<em>In order to calculate the slope m between two points (x1, y1) and (x2, y2), we can use the formula below:</em>
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<em>So, for points (4, 2) and (-16, -10), we have:</em>
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<em>Therefore, The Answer is </em>
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