Answer:
y=120
Step-by-step explanation:
Y varies directly as x is written as
[tex]y \alpha x[/tex]
introducing a constant
y=kx
from the question, when y=48, x=6
substitute it in the formula
48=6k
making k the subject by dividing through by 6
[tex] \frac{48}{6} = \frac{6k}{6} [/tex]
k=48/6
k=8
put the value of k in the expression y=kx
y=8x
from the question,the value of y when x=15 is given by
y=8×15
y=120.
