Graph each equation. ƒ(x) = x

검증된 단계별 안내

Identify the given function: \(f(x) = x\). This is a linear function where the output value equals the input value.

Recognize that the graph of \(f(x) = x\) is a straight line passing through the origin (0,0) because when \(x=0\), \(f(x)=0\).

Determine the slope of the line. Since the function is \(f(x) = x\), the slope is 1, meaning the line rises one unit vertically for every one unit it moves horizontally.

Plot several points to help draw the line accurately. For example, when \(x=1\), \(f(1)=1\); when \(x=2\), \(f(2)=2\); when \(x=-1\), \(f(-1)=-1\).

Draw a straight line through all the plotted points, extending in both directions, to complete the graph of \(f(x) = x\).

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주요 개념

질문에 올바르게 답하기 위해 반드시 이해해야 하는 핵심 개념들은 다음과 같습니다.

Understanding the Function Notation ƒ(x)

The notation ƒ(x) represents a function named ƒ with input variable x. It means that for each value of x, the function assigns a corresponding output value. Recognizing this helps in interpreting the equation and plotting points on a graph.

Graphing Linear Functions

A linear function like ƒ(x) = x produces a straight line when graphed. The equation shows that the output equals the input, so the graph passes through points where x and y are equal, forming a line with a slope of 1 and y-intercept at 0.

Plotting Points and Using the Coordinate Plane

To graph ƒ(x) = x, plot points where the x-coordinate equals the y-coordinate, such as (1,1), (2,2), and (-1,-1). Understanding how to plot these points on the coordinate plane and connect them helps visualize the function's behavior.