The following graph shows the ratio of bachelor's degrees earned by women to men from 1960 through 1990. 
How fast was the ratio changing in the period from 1960 to 1980?
__________
From 1980 to 1990?
__________
Definitions:
Graph Section
A graph section is part of a visual representation, such as charts or diagrams, used to display data and analyze trends within a document or presentation.
Introduction
The initial phase in the product life cycle where a new product is launched into the market.
Selective Demand
Consumer demand focused on distinct brands or products rather than on the category as a whole, often influenced by marketing strategies.
Product Class
Product class pertains to the category or grouping of products based on similar characteristics, uses, or intended customers.
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