plss help equation for this statement

Question

the distance D travelled by a car varies directly as its speed s

Answer 1

Speed formula: s = d/t

distance (d) varies directly as speed (s): d is proportional to speed. d is also proportional to time (t).

Answer 2

D = ks

Answer 3

I want show my answer

Answer 4

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Answer 5

(a). Xenny is traveling by car,and the distance she travels, d, varies directly with the amount of time, t, that she drives.In 3hrs she drove 60km.Find the constant of variation and the equation relating d to t.