Suppose that y varies directly with x and y=3 when x=9. what is y when x=18

6

Step-by-step explanation:

y varies directly with x means:

y = kx

Given that y = 3 when x = 9:

3 = 9k

k = 1/3

Therefore:

y = 1/3 x

When x = 18:

y = 1/3 (18)

y = 6

b) the dogs need to shift their focus to human scent.

the equation for this situation is y=122+45. to solve the equation you would add 45 and 122 to get a total of 167lbs. in conclusion, grace's weight eight weeks ago was 167lbs.