The answer to your problem is 54.
The answer isNot proportional

<h2>
Explanation:</h2>
In this exercise, we have the following point:

Let's assume that y varies directly as x, so this implies we can writ y as the product of x and some non-zero real constant k. In a mathematical language:

As you can see, this is the equation of a line whose slope is k and passes through the origin. Therefore, the slope of the line is the constant of proportionality we are looking for:

<h2>Learn more:</h2>
Direct and indirect proportionality: brainly.com/question/10945121
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Answer: 5x+2y=2
Step-by-step explanation:
5x+2y=2 move 5x to the other side
2y=-5x+2 divide the other side by the 2 from 2y
y=-5x+1
3/5, as 80/100 - 20/100 = 60/100, which simplifies to 3/5.