At a fixed checked gradient, distance changes the predicted signal level. Exact arithmetic here means exact results for the stated model inputs; measured inputs still carry uncertainty and significant-figure limits.

highlighted = computed this step

One metre adds two signal units

The source gradient is 2 per metre. One metre from starting signal 6 predicts signal 8.

6+21=86+2\cdot1=8
Signal prediction ledgerA distance along the checked gradient predicts a signal level.distance8

Two metres predicts ten

Distance 2 m adds 4 signal units, so predicted signal is 10.

6+22=106+2\cdot2=10
Signal prediction ledgerA distance along the checked gradient predicts a signal level.distance10

Three metres predicts twelve

Distance 3 m predicts signal 12. No sensor noise or adaptation is claimed.

6+23=126+2\cdot3=12
Signal prediction ledgerA distance along the checked gradient predicts a signal level.distance12