Question

Suppose f(x) varies inversely with x and f(x)=3 when x=10. What is the value of f(x) when x=15

A=0.3
B=2
C=4.5
D=30
Please show me how you solved it I will mark brainliest if you show me.

Answer 1

The answer to this question would be: C=4.5
Assuming the function consist of f(x)= ax function, then for x=10 and f(x)=3 you can determine the variable a
f(x)= ax
3= a*10
a= 3/10= 0.3

Then the function must be f(x)= 0.3x
For x= 15, the f(x) would be:
f(x)= 0.3x
f(15)= 0.3 * 15= 4.5

Answer 2

Answer:

its D or A

Step-by-step explanation: