Question

If the value of y varies directly with x when y=50, x=4. What is the value of y when x=2

Answer 1

Answer:

Step-by-step explanation:

The general equation for a direct variation is y = k*x

So your first step (usually) is to find k

y = k x

when x = 4

then y = 50

• y = k*x
• 50 = k * 4              Divide by 4
• 50 / 4 = k*4/4
• 12.5 = k

Now you can find the value of y when x = 2

• y = k*x
• k = 12.5
• x = 2
• y = ?

y = 12.5 * 2

y = 25