Calculating Direct Variation
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Consider the table of values.
If y varies directly with x, the constant of variation is
x
y
0
0
The equation representing this relationship is
What is the value of y when x = 11?
1
on
y = x
2.
10
y = 2x
y = 5x
y = 10x
3
15
4
20

Becca wants to mix fruit juice and soda to make a punch. she can buy fruit juice for $3 a gallon and soda for $4 a gallon. if she wants to make 28 gallons of punch at a cost of $3.25 a gallon, how many gallons of fruit juice and how many gallons of soda should she buy?