If the value of y value directly with x, which function represents the relationship between x and y when x=3 and y=21?
1 answer:
Answer:
y
=
2
9
x
Explanation:
If
y
varies directly with
x
then
XXX
y
=
k
⋅
x
for some constant
k
Given
x
=
30
→
y
=
20
3
implies
XXX
20
3
=
k
⋅
30
XXX
→
k
=
20
3
30
=
20
90
=
2
9
Step-by-step explanation:
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