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In the last column in the data table, it says that it's about voltage(v) divided by current(A) is equal to ohms so V/A = ohms.

So if it's V/A and if you divide them to get the slope it's (y2-y1)/(x2-x1) then shouldn't V be the y value and A be the x value?

And can you also try to use a line of best bit instead of drawing the line through each dot?

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