Question

y is directly proportional to x and y=10 when x=4 find the formula connecting y and x and find y when x=8​

Answer 1

X=5
Explanation
The initial statement is y♾1/x
To convert to an equation multiply by k the constant of variation
Y=k x 1/x =k/x
To find k use the given condition
Y=10 when x=4
Y=k/x —k= yx =10x4 =40
Equation is y =40/x
When y =8
X= 40/y =40/8 =5