Answer:
The greatest common factor of 12m^2 and 9b^4 is 3.
I hope this could help, let me know if you need anymore help.
Intersection
Where the graph line matches with which column of graph...... take a line from that place to the axis to identify value on that point of intersection
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Go 6 units in X axis and 1 unit in Y axis and you get V.
Alternative B