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.purplemath.com/modules/intrcept.htm

Take a closer look, and you'll see that the y-axis is also the line "x = 0". ... an x-
intercept is a point in the equation where the y-value is zero, and; a y-intercept is
a ...

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.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.themathpage.com/alg/equation-of-a-line-2.htm

The y-intercept is the value of y where it crosses the y-axis. To find the x-intercept,
we have to find the value of x where y = 0 -- because at every point on the ...

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

Current time:0:00Total duration:3:58 ... Intercepts of lines review (x-intercepts and
y-intercepts) ... Its x-value could be anything, but we know it's y-value is 0.

www.khanacademy.org/math/algebra-home/alg-linear-eq-func/alg-x-and-y-intercepts/v/finding-x-intercept-of-a-line

Sal determines the x-intercept of a linear equation from a graph. ... have to figure
out what x value, when y is equal to 0, will have this equation be true. So we ...

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

Sal finds the x and y-intercepts of -5x + 4y = 20. ... Slope. Current time:0:00Total
duration:4:08 ... Well, my y value is 0, I'm not above or below the x-axis. Let me ...