Answer:
y
=
8
Step-by-step explanation:
Explanation:
the initial statement is
y
∝
x
to convert to an equation multiply by k the constant
of variation
⇒
y
=
k
x
to find k, use the given condition for x and y
y
=
10
when
x
=
5
y
=
k
x
⇒
k
=
y
x
=
10
5
=
2
the equation is
¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯
∣
∣
∣
2
2
y
=
2
x
2
2
∣
∣
∣
−−−−−−−−−−−
x
=
4
→
y
=
2
×
4
=
8
Belinda's weekly expenses are
Bus fare $8.70
Lunch out $7.35
Haircut $16.00
Movie rental $5.95
Total = 8.70 + 7.35 + 16.00 + 5.95 = $38.00
Answer: d. $38.00
