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BARSIC [14]
3 years ago
10

If y varies directly as x, and y=-4 when x=8 find y when x=3

Advanced Placement (AP)
1 answer:
geniusboy [140]3 years ago
7 0

Answer:   Another way of looking at it!

y

=

10

Explanation: Explanation:

This is a ratio question in disguise.

By parts of the question:

"When y varies directly with x"

→

y

x

"

"if y=8 when x=4"

→

.

.

y

x

=

8

4

"how do you find y when x=5"

→

y

x

=

8

4

=

y

5

so

y

=

8

×

5

4

=

10

This is the same thing as using 'k' in the other solution

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