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The variable x and y vary directly. Write an equation that relates x and y. Then find y when x = 12. x = 4, y = 8

The variable x and y vary directly. Write an equation that relates x and y. Then find y when x = 12. x = 4, y = 8
asked 188k views
18 votes
The variable x and y vary directly. Write an equation that relates x and y. Then find y when x = 12.

x = 4, y = 8

asked
User Victortv
by
8.6k points

1 Answer

7 votes

Answer:

24

Explanation:


y=kx

at (4, 8): 8 = 4k ⇒ k = 2

So
y=2x

when
x=12,
y=2 * 12=24

answered
User SzilardD
by
8.1k points
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