Determine whether y varies directly with x. if so find the constant variation and write the equation x -6, -9, -15; y 2, 3, 5

as you can see above, we can see that "x" can be a product of whatever "y" happens to be, so we know each variable is just a factor away from the other.

Direct variation; k = -3; y = -3x  

Step-by-step explanation:

The formula for direct variation is

y = kx     Divide both sides by x

k = y/x

For x = -6, y = 2:

k = -6/2

k = -3

For x = -9, y = 3:

k = -9/3

k = -3

For x = -15, y = 5:

k = -15/5

k = -3

y = -3x

y and x are always in the same ratio, so y varies directly with x.

24

step-by-step explanation:

the graph shows 30% of students walk. 80 students were questioned, so the number that said they walk is

30% × 80 = 0.30 × 80 = 24

step-by-step explanation: