Final answer:
To find the value of x when y is 4 in the equation y = 1/9 x, we can substitute y = 4 and solve for x. To determine the value of x when y is 4 for the equation y = 1/9 x, multiply both sides by 9, leading to x=36.
Step-by-step explanation:
The equation y equals 1/9 x represents a proportional relationship between quantities x and y. In this equation, the value of y is directly proportional to the value of x.
To find the value of x when y is 4, we can substitute y = 4 into the equation and solve for x:
y = 1/9 x
4 = 1/9 x
Multiplying both sides of the equation by 9, we get:
36 = x
Therefore, the value of x when y is 4 is 36. Hence x=36.