Identify the variation as direct, inverse, joint or combined.
2 answers:
Answer:
The statements " cost of the number of the same articles purchased varying with the number purchased' shows direct variation .
Option (a) is correct .
Step-by-step explanation:
Definition of the direct variation
When two variables that can be expressed by an equation in which one variable is equal to a constant times the other.
i.e
x = ky
As the x increases than y is also increase .
As given the statement in the question
The cost of the number of the same articles purchased varying with the number purchased.
i.e
As the number of purchased article increases thus cost of the articles also increases .
Therefore the statements " cost of the number of the same articles purchased varying with the number purchased' shows direct variation .
Option (a) is correct .
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Answer:
where −5 ≤ x ≤ 3
Step-by-step explanation:
The given function is .
We want to select the option that describes all the solutions to the parabola.
The domain of the parabola is −5 ≤ x ≤ 3.
This means that any x=a on −5 ≤ x ≤ 3 that satisfies (a,f(a)), is a solution.
This can be rewritten as
Therefore for x belonging to −5 ≤ x ≤ 3, all solutions are given by:
where −5 ≤ x ≤ 3.