The value of the constant of proportionality k = 36
The Direct Variation :
Direct Variation is said to be the relationship between two variables in which one of the variables is multiple of the other variable.
When x is directly proportional to y then the relation can be written as
= > x ∝ y
=> x = ky [ here k is constant value ]
Here we have,
The number of words Latisha can text 'y' is varies directly with 'x' the number of minutes spent texting
Here, y = 180 and x = 5
From the above data,
=> 180 = k (5)
=> k = 180/5 = 36
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