Since, the values of hours in numerically smaller than than the values of distance traveled in miles so we take the value of hours on x-axis and the distance traveled in miles on y-axis
For, The increment : On the x-axis we take the increment of 5 units and on the y-axis we take the increment of 10 units
Yes he is correct because the 3 was in the tenths place. so say that the 3 is in the ones place multiply it by 10 and equales 3000. so you are just taking one zero with it