The variables x and y vary directly. Use the given values to write an equation that relates x and y: x = 3, y = 15

Question

The variables x and y vary directly. Use the given values to write     an equation that relates x and y:  x = 3, y = 15

anonymous · Answer

6x-3=y

anonymous · Answer

If they vary directly, that means
y = cx for some value c.
Solve for c by plugging in the x and y we know
15 = 3c
so, c = 5
The equation that relates x and y is y = 5x

the_fizicx99 · Answer

The formula for direct variation is y = kx

15 = 3x
/3      /3

x = 5

So, 15 = 3(5)

15 = 15 so true :3

anonymous · Answer

it said that make an equation so i make it complicated but the simplest is 5x=y :D

anonymous · Answer

Thank you