The graph of a proportional relationship passes through (9, 18)
and (1, y)
. Find y
Help pls
proportional relation means y/k is constant. So, you want y such that
y/1 = 18/9
To find the value of y, we need to determine the proportionality constant of the relationship.
The formula for a proportional relationship is y = kx, where y represents the dependent variable, x represents the independent variable, and k represents the proportionality constant.
Given the two points, (9, 18) and (1, y), we can set up two equations based on the formula:
Equation 1: 18 = k * 9
Equation 2: y = k * 1
To solve these equations, we can divide Equation 1 by 9 to isolate the k variable:
18/9 = (k * 9)/9
2 = k
Now that we know k = 2, we can substitute it into Equation 2 to find the value of y:
y = 2 * 1
y = 2
Therefore, when x = 1, y = 2 in the proportional relationship.