A pedestrian is walking at a speed of 3km/h. Express the distance in kilometers, d, as a function of time in hours, t

Explanation:

I'm using the formula

d = rt

where

Afterward, I replaced r with 3 to represent the 3 km/hr speed.

So that's how we go from d = rt to d = 3t

If for example, they traveled for t = 2 hours, then d = 3t = 3*2 = 6 km is the distance they walk.

d = (3 km/hr)t

Step-by-step explanation:

Recall that distance = rate times time.

Here, distance = (3 km/hr)(time), or d = (3 km/hr)t, where t:  number of hours

y = 2x

step-by-step explanation:

if you divide each number in the sequence, you'll see that they all have a multiple factor of 2. each number in the series, and any other numbers which may continue, will be multiplied by 2. therefore, y is the next number in the sequence, and x is the current one, so, our formula will be y = 2x.

126 maybe. sorry