I think the answer for this is a quadratic ewquation, as the graph has a curvy line but its been a yer since i've done them and i don't know how i would work this one out.
In geography, i worked out house quality and distance now i want to work out a quadratic equation ( i think it would be) to link the two. these are the sets of data i have, for the same graph and equation:
But for the quality you could round it to 11, 27 and 31, but the distance is so small that you couldn't unles you used a different unit, which you are welcome to do aslong as you tell me which units you use and what the distance comes out as.
sorry if its realy difficult but i can't remember how to do them and even if i could its probabaly a level stuff.
Im not sure you need to round- rounding from 10.51 to 11 is a 5% change.
As for distances, there's no harm in leaving as miles but if you want bigger numbers you could convert to kilometres (8 km=5 miles) or metres.
I'll come back to you on the quadratic, although I suggest that 3 readings is perhaps not enough to gib=ve reliable result