Find the missing value of the direct variation (2,5) (5,y)

The missing value y=12.5 and we have (5,12.5)

Step-by-step explanation:

The formula used for direct variation is:

We need to find missing value (2,5)(5,y)

First we will find k, and then y

We have x=2, y=5

Find k:

Now, we cam find missing value in (5,y)

We have x=5, k=2.5 and y=?

So, the missing value y=12.5 and we have (5,12.5)

a) y = -3x +2

b) y = 1/2x -6

these 2 can be combined into one equation.

-3x +2 = .5x -6

8 = 3.5x

x = 8 / 3.5 = 2.2857142857

y = -3 * (8 / 3.5) +2

y = (-24 / 3.5) + 2

y = -4.8571428571

step-by-step explanation:

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