Comparing map distance to real distance we get 2cm/4km. That means 1cm = 2km.
So the map distance is half the real distance (well, technically not as one is in cm and the other in km but it’s enough to think this way) and a real distance of 10km must mean a map distance of half that (again ignoring the units) so we get 5cm.
2800 x 0.07 = 196
2800 + 196 = 2996
Total paid = $2996
1/10 is the next fraction in the sequence. If you multiply the numerator and denominator by a common factor to give each fraction a denominator of 20, the pattern goes 6/20, 5/20, 4/20, 3/20. The next term would be 2/20 which equals 1/10.
In the points on the scatter-plot are close together and resemble a line. If you cannot see a line, that means there is not correlation. A line going down is negative correlation, and a line going up is positive correlation.
