How much more would the value of y be on the graph than its value in the table when x = 12?

The value increases by 70 for every two x steps, so 35 per x and starts with 0
at x=8 it is 280 or 8*35

so for x=12 the value would be 12*35=420
or by adding to the x=8 value 280+4*35=280+140=420

so the increase is 4*35=140

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