Answer:
7
Step-by-step explanation:
We are given that a function
Domain=W(whole numbers set)
Range=W(Whole number set)
Assign each whole number to its largest place value digit.
We have to find the value of f(257).
For example
f(4)=4
f(14)=4
f(194)=9
Therefore, f(257)=7 because largest place value digit is 7 in 257.
Answer:
k = 18
Step-by-step explanation:
Given that y varies inversely as x then the equation relating them is
y = ← k is the constant of variation
To find k use the condition y = 3 when x = 6, that is
3 = ( multiply both sides by 6 )
18 = k
The constant of variation is k = 18