If Y varies directly as X and Y = 79 when X = 49, Find Y if X = 9

y = 14.5

Step-by-step explanation:

given that y varies directly as x

mathematically,

y ∝ x

y = kx ... where k is the constant of proportionality.

k = y / x

given that

y = 79

x = 49

k = 79/49

k = 1.61

to find y when x = 9

from

y = kx

y = 1.61 * 9

y = 14.5

therefore the value of y when x = 9 in ths variation is evaluated to be equals to 14.5