Answer:
The cost is $75
Step-by-step explanation:
Given
[tex]y = 25x[/tex]
Required
Cost of 3 cubic yards -- Missing from the question
The required means that: [tex]x = 3[/tex]
Plug in [tex]x = 3\\[/tex] to [tex]y = 25x[/tex]
[tex]y = 25 * 3[/tex]
[tex]y = 75[/tex]
The cost is $75
