Which conclusion can best be made from this scatter plot?

Study results indicate that the mean length of time people spend on a bus in a city is between 21.2 min and 24.5 min what is the study margin of the error?

The floor of a building consists of 3000 tiles which are rhombus shaped and each of it's diagonals are 45 cm and 30 cm in length. find the total cost of polishing the floor, if the cost per m² is rs. 4.

Arecipe calls for 3 ounces of flour for every 2 ounces of sugar. find the constant of proportionality.