Answer:
[tex]y = 0.98x[/tex]
Step-by-step explanation:
Given
Cost of 4 lb orange = $3.92
Cost of 40 lb orange = $39.20
Required
Determine the proportion
The proportion can be calculated susing:
[tex]y = kx[/tex]
Where k = proportion
Make k the subject:
[tex]k = \frac{y}{x}[/tex]
When y = 3.92 and x = 4
The proportion (k) is calculated as thus:
[tex]k = \frac{y}{x}[/tex]
[tex]k = \frac{3.92}{4}[/tex]
[tex]k = 0.98[/tex]
When y = 39.2 and x = 40
Using the same formula:
[tex]k = \frac{39.2}{40}[/tex]
[tex]k = 0.98[/tex]
Substitute 0.98 for k in [tex]y = kx[/tex]
Hence, the proportional relationship is
[tex]y = 0.98x[/tex]
