Nine times the input minus seven is equal to the output.Which of the following equations describe this function?
1 answer:
Consider the function y = f (x), the element 'x' is the input of the function, and 'y' is the value of the function or the output.
Now, we have to determine the equation for " Nine times the input minus seven is equal to the output"
Since, the input of the function refers to the variable 'x' and output of the function refers to the variable 'y'.
The required equation is:
So,
Therefore, 9x-7=y is the required equation.
Therefore, Option C is the correct answer.
You might be interested in
Option D: is the solution to the inequalities.
Explanation:
From the given graph, we can see that the equation of the inequalities are
and
To determine the coordinate that satisfies the inequality, let us substitute the coordinates in both of the inequalities and
Thus, we have,
Option A:
Substituting the coordinates in and
, we get,
is not true.
is true.
Since, only one equation satisfies the condition, the coordinate is not a solution.
Hence, Option A is not the correct answer.
Option B:
Substituting the coordinates in and
, we get,
is not true.
is not true.
Since, both the equations does not satisfy the condition, the coordinate is not a solution.
Hence, Option B is not the correct answer.
Option C:
Substituting the coordinates in and
, we get,
is not true.
is true.
Since, only one equation satisfies the condition, the coordinate is not a solution.
Hence, Option C is not the correct answer.
Option D:
Substituting the coordinates in and
, we get,
is true.
is true.
Since, both equation satisfies the condition, the coordinate is a solution.
Hence, Option D is the correct answer.