Answer:
The value of y is two times the value of x

Explanation:
Let
y ----> the height in inches
x ----> the time in hours
we have the ordered pairs
(1, 2), (2, 4), and (3, 6).
step 1
Find the slope
take two points to calculate the slope
(2, 4), and (3, 6)
The formula to calculate the slope between two points is equal to

substitute



step 2
Find the equation of the line in point slope form

we have


substitute

Convert to slope intercept form
isolate the variable y

Is a proportional relationship between the variable x and the variable y
therefore
The value of y is two times the value of x