en.wikipedia.org/wiki/Y-intercept

The y-intercept of ƒ(x) is indicated by the red dot at (x=0, y=1). In analytic
geometry, using the common convention that the horizontal axis represents a ...
Because functions associate x valu...

www.montereyinstitute.org/courses/Algebra1/COURSE_TEXT_RESOURCE/U04_L1_T2_text_final.html

To find the y-intercept, we substitute 0 for x in the equation, because we know
that every point on the ... of 0. Once we do that, we can solve to find the value of y.

www.wtamu.edu/academic/anns/mps/math/mathlab/beg_algebra/beg_alg_tut22_int.htm

Jul 31, 2011 ... With that in mind, what value is y always going to be on the x-intercept? No
matter where you are on the x-axis, y's value is 0, that is a constant.

www.algebralab.org/lessons/lesson.aspx?file=algebra_lineareqintercepts.xml

To find an x-intercept, let the value of y in the equation be equal to zero. ... A
horizontal line (other than y = 0) will not have an x-intercept. The line y = 0 is
another ...

www.khanacademy.org/math/algebra-home/alg-linear-eq-func/alg-x-and-y-intercepts/v/graphing-using-x-and-y-intercepts

An old video of Sal where he draws the line y=3x-9 by finding its x- and y-
intercetps. ... When you think x-intercept, you say, OK, that means my y-value is 0.

www.math.com/school/subject2/lessons/S2U4L2DP.html

Slope is the ratio of the change in the y-value over the change in the x-value. ... if
you know the equation, the y-intercept is the solution to the equation when x = 0.
... the x and y values of a point on the line into the equation, you will get a true ...

www.themathpage.com/aprecalc/roots-zeros-polynomial.htm

The relationship between the roots and the x-intercepts of a graph. ... At the x-
intercept -- on the x-axis -- y = 0. The y-intercept is that value of y where the graph
...

www.chilimath.com/algebra/intermediate/int/x-and-y-intercepts.html

You may think of this as a point with y-value of zero. To find the x-intercepts of an
equation, let y = 0 then solve for x. In point notation, it is written as ( x , 0 ).

www.tpub.com/math1/13a.htm

At the X intercept, the graph line is touching the X axis, and thus the Y value at ...
The Y intercept is found by letting x = 0 and finding the corresponding value of y.
... This is true because substituting -3 for x and -2 for y reduces the equation to ...

www.mathplanet.com/education/algebra-1/visualizing-linear-functions/linear-equations-in-the-coordinate-plane

The point in which the graph crosses the x-axis is called the x-intercept and the ...
The x-intercept is found by finding the value of x when y = 0, (x, 0), and the ...