Question

A student is running a 3-kilometer race. He runs 1 kilometer every 2 minutes. Select the function that describes his distance from the finish line after x minutes. f of x equals negative one third x plus 2 f of x equals negative one half x plus 3 f of x equals one half x plus 3 f of x equals one third x plus 2

Answer 1

f(x) = (1/2)X

Explanation:

speed = distance / time

distance = speed x time

3 = (1/2) X

X = 3/(0.5) = 6min

let distance = F(X)

f(x) = (1/2)X

Answer 2

Answer:x - number of minutes;

f ( x ) - the distance from the finish line.

x : 0 2 4 6

f ( x ) : 3 2 1 0

f ( x ) = 3 - x/2

Answer: B ) f ( x ) = -1/2 x + 3

Explanation: