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Mathematics 20 Online
OpenStudy (ellerai):

Can someone explain to me how to find x and y intercepts?

OpenStudy (queenie):

of what ?

OpenStudy (ellerai):

x−4y=−8

OpenStudy (queenie):

to find the x intercept, sub in 0 for y and solve for x. to find the y intercept, sub in 0 for x and solve for y

OpenStudy (ellerai):

ooh okay so can you double check my work?

OpenStudy (queenie):

sure can

OpenStudy (ellerai):

so for x i got x = -8

OpenStudy (queenie):

yes...or it can be written as (-8,0)

OpenStudy (ellerai):

oh okay! so for y i got (0,-2)

OpenStudy (queenie):

correct

OpenStudy (ellerai):

thank you very much for your help!

OpenStudy (queenie):

oh...wait...its (0,2)

OpenStudy (ellerai):

how so?

OpenStudy (queenie):

negative divided by a negative is a positive -8/-4 = 2

OpenStudy (ellerai):

oh my bad, i forgot to divide by -4, i divided by 4

OpenStudy (queenie):

easy mistake to make...but u got to watch ur signs, they can really mess things up

OpenStudy (ellerai):

yeah aha oops

OpenStudy (mathstudent55):

You solved the problem and got the correct answer, but I think it's important to understand the concept, not just to know how to solve the problem. Think of what the x-intercept and y-intercept of a line are. The x-intercept is the point where the line crosses the x-axis. The y-intercept is the point where the line crosses the y-axis. The x-intercept is on the x-axis. On the x-axis, every point has y-coordinate 0. That is why to find the x-coordinate, you let y = 0 and solve for x. The y-intercept is on the y-axis. On the y-axis, every point has x-coordinate 0. That is why to find the y-intercept, you let x = 0 and you solve for y. If you understand and remember the concept, you will know what to do next time.

OpenStudy (ellerai):

Thank you, @mathstudent55 i understand now and will make sure to remember so :))

OpenStudy (mathstudent55):

You're welcome.

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