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3 votes
Given that y and x are directly proportional and

y=2 when x=7, find the value of y when x=17.5.

User Dlcardozo
by
8.2k points

2 Answers

3 votes

Answer:

y = 5.

Explanation:

Direct proportionality is : y = kx where k is a constant.

Finding k by substituting the given values of x and y:

2 = k * 7

k = 2/7.

So the equation is y = 2/7 x.

When x = 17.5:

y = 2/7 * 17.5

y = 5.

User MKaz
by
7.8k points
4 votes

Answer:

The answer is: 5.

Explanation:

Set up an equation:

2 / 7 = y / 17.5

Cross multiply:

7y = 2 * 17.5

7y = 35

y = 35 / 7 = 5

User Amityo
by
8.7k points

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