X and Y Intercept Formula

The graphical concept of x- and y-intercepts is pretty simple. The x-intercepts are where the graph crosses the x-axis, and the y-intercepts are where the graph crosses the y-axis. The X-intercept of a line gives the idea about the point which crosses the x-axis.

Same way, the y-intercept is a point at which the line crosses the y-axis. One can find out only one intercept at a time in a given equation.

X and Y Intercept Formula

The x-intercept of a line is the point at which the line crosses the x axis. ( i.e. where the y value equals 0 )

x−intercept=(x,0)

The y-intercept of a line is the point at which the line crosses the y axis. ( i.e. where the x value equals 0 )

y−intercept=(0,y)

Solved Example of X and Y Intercept

Example: Find the x- and y-intercepts of

25x2+4y2=9

Solution
Use the formula of the intercepts to find X and Y Intercept separately.

x-intercept:
Substituting y = 0 for the x-intercept, so:

25x2+4y2=925x2+4(0)2=925x2+0=9x2=925x2=±35

Then the x-intercepts are the points (

35,0
) and (
−35,0
).

y-intercept:
Substituting  x =0 for the y-intercept, so:

25x2+4y2=925(0)2+4y2=90+4y2=9y2=94y=±32

The y-intercepts are the points (0, 3/2) and (0, -3/2).

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