Question

Determine whether y varies directly as x. If so, find the constant of variation.

y = -1.2x

Answer 1

What do you think? Do you think y varies directly with x?

Answer 2

No? But how do you determine that, is what I'm trying to ask.

Answer 3

if the equation is in the form

y = kx

then y varies directly with x

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If the equation is in the form

y = k/x

then y varies inversely with x

Answer 4

Then what's the constant of variation?

Answer 5

-1.2?

Answer 6

you got it