In 2016 there were about 64,500 cinema screens in a country.
If about 29.9% of screens in the country were digital 3-D screens, we would determine the approximate number of 3D screens by dividing the Percentage of 3D screens by the total percentage of 100 and multiplying by the total number of cinema screens. It becomes
This is because the b value determines the y intercept, and if you move the function down 7, you are technically subtracting 7 from the current b value which was 0.