Which set of parametric equations describes a line that passes through the points (0,0) and (4,8) ?

A) x=t , y=2t
B) x=2t , y=3t
C) x=2t , y=t
D) x=4t , y=2t

The correct option is A)

Step-by-step explanation:

To find the correct equation we first need to calculate the angular coefficient for the line, with the formula below:

m = (y2 - y1)/(x2 - x1)

m = (8 - 0)/(4 - 0) = 8/4 = 2

Using that we can apply to the equation of the line:

y = m*x + c

Since the line pass through (0,0) c must be equal to 0, so:

y = m*x

y = 2*x

So x must be:

x = t.

no solution

step-by-step explanation:

there is not enough information in the problem to solve.

answer: 80,000

step-by-step explanation:

the population doubles every day.

10,000*2=20,000 day 4

20,000*2=40,000 day 5

40,000*2=80,000 day 6