The graph given below shows the sale of cars (in thousands of units) by a car-making company A in the years 2020 through 2023 and the table given below shows the ratio of production of cars to sales in the years 2020 through 2023. Study the graph and table carefully and answer the question.


If the average production in these four years is x and the average sales in these four years is y, then
x : y is :