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melamori03 [73]
3 years ago
5

50.For the direct variation such that when y = 2 then x = 3, find the constant of variation ( k ) and then find the value of y w

hen x = –0.5.
Mathematics
1 answer:
tamaranim1 [39]3 years ago
3 0

Step-by-step explanation:

Since it's a direct variation

y = kx

where k is the constant of proportionality

To find the value of y when x = –0.5 we must first find the relationship between the variables

When

x = 3

y = 2

2 = 3k

Divide both sides by 3

k =  \frac{3}{2}

So the formula for the variation is

<h3>y =  \frac{3}{2} x</h3>

When x = - 0.5 or - 1/2

y =  \frac{3}{2} ( -  \frac{1}{2} )

We have the final answer as

<h2>y =  -  \frac{3}{4}</h2>

Hope this helps you

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