Suppose that y varies directly with x, and y = 10 when x = 5. What direct variation equation relates x and y? What is the value
of y when x = 2?
2 answers:
The constant of variation is usually given using the letter k.
To find K you would divide Y by x, so the equation becomes k = Y/x.
First find k using the first y and x values provided:
k = 10/5 = 2
Now you know k, you can solve for y when x = 2:
using the equation k =y/x, replace k and x with the known values and solve for y:
2 = y/2
y = 2*2
y = 4
Answer: Linear equation y=2x
Step-by-step explanation:
If x=2
Then y=2(2)
y=4
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