Is 600 km less, more, or equal to 5 m

Do you mean miles or meters but, ill give you the answer for both.

A. If you are finding whether 600 kilometers are more or less than 5 meters, 600 kilometers are more than 5 meters.

B. If you are finding whether 600 kilometers are bigger or smaller than 5 miles, 600 kilometers are bigger than 5 miles.

(1,4) is on graph of f(x)

f(1) = 4

so 1/4 f(x)

1/4 f(1)

1/4. ×4

1

so point for function 1/4. f(x) is (1,1)

you can't solve x because it is 2 linear equation and you only have one equation