Algebra formula based function
Answer:
the increase is by 2
Step-by-step explanation:
You can add 17 plus 2 or subtract 17 from 19.
Answer:
The prediction for the number of transistor per IC in 1992 is of 4,194,304,000
Step-by-step explanation:
Moore's law:
Moore's law states that the number of transistors per IC doubles every year.
Format of the function:
Following Moore's law, t years after our initial estimative, the number of transistors per IC will be given by:

In which N(0) is the initial estimate.
The number of transistors per IC in 1972 seems to be about 4,000 (a rough estimate by eye).
This means that 
So

What would you predict the number of transistors per IC to be 20 years later, in 1992?
This is N(20). So

The prediction for the number of transistor per IC in 1992 is of 4,194,304,000
You could use the proportion 3:1.
Per 3 feet, there is 1 yard.
For every 3 feet, there is an additional yard.
The ratio is 3 to 1, or 3:1