Question

Какая из них нисходящая и растущая f(x)=8x+7 ; f(x)=-4x-5

Answer 1

F(x)=8x+7-возрастающая; f(x)= -4x-5-убывающая.

Answer 2

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To answer your question, the functions f(x)=8x+7 and f(x)=-4x-5 are linear functions, which means they have a constant slope. The slope of a linear function is the coefficient of x, which is the number that multiplies x.

The slope of f(x)=8x+7 is 8, which is a positive number. This means that the function is increasing, or ascending. As x increases, f(x) also increases.

The slope of f(x)=-4x-5 is -4, which is a negative number. This means that the function is decreasing, or descending. As x increases, f(x) decreases.

You can also see this by graphing the functions. Here is a graph of f(x)=8x+7 and f(x)=-4x-5:

![graph](https://mathsolver.microsoft.com/en/solve-problem/f%20%28%20x%20%29%20%3D%208%20x%20-%207/graph