Xvaries directly as y. if x is 9 when y is 4, find x when-y is 8.
a) write the variation.
b) find x when y is 8.
a) how are these two variables related?
i oo
od. x=ky
b) the quantity indicated is

see explanation

Step-by-step explanation:

Given x varies directly as y then the equation relating them is

x = ky ← k is the constant of variation

To find k use the condition x = 9 when y = 4

k = = = 2.25

x = 2.25y ← equation of variation

When y = 8, then

x = 2.25 × 8 = 18

i would pic false cause it goes down towards negative

step-by-step explanation:

the answer is:

mean: 6

mad: 2.14