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Y-Intercept
Definition Of Y-Intercept
The y-coordinate of the point where a line intersects the y-axis is the y-intercept of that line.
More About Y-Intercept
The x-coordinate of the point where a line intersects the y-axis is 0. So, the y-intercept of a line can also be found by substituting x = 0 in the equation of the line.
Examples of Y-Intercept
The y-intercept of the line shown is -6.
Video Examples: Graphing Linear Functions by Finding X,Y Intercept
Solved Examples on Y-Intercept
Ques: Find the y-intercept of the line shown in the graph.
Choices:
A. - 3
B. 0
C. 3
D. 1
Correct Answer: A
Solution:
Step 1: The y-coordinate of the point where a line intersects the y-axis is the y-intercept of that line.
Step 2: The graph of the line crosses the y-axis at (0, - 3).
Step 3: So, the y-intercept of the line is - 3.