## anonymous one year ago what is the y intercept of the graph of 7x=3y-8

1. anonymous

for finding the y intercept you have to let x=0 and then solve for y

2. anonymous

put it in slope intercept form

3. anonymous

if i divid 3 from 0 ill get 0

4. mindblast3r

to put it in slope intercept form you gotta add and subtract. remember you gotta when you're doing it do it to both sides.

5. mindblast3r

and divide and multiply

6. anonymous

what? divide what

7. anonymous

subtract what?

8. texaschic101

sub in 0 for x 7x = 3y - 8 7(0) = 3y - 8 0 = 3y - 8 --- subtract 3y from both sides -3y = -8 -- now divide by -3 y = -8/-3 y = 8/3

9. mindblast3r

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10. mindblast3r

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11. mathstudent55

The y-intercept is the point where the line crosses the y-axis. On the y-axis, all points have x-coordinate zero. The quickest way to do this is to replace x in the equation with zero, and solve for y. In other words, do what @mukushla suggest in the first response to this question.

12. texaschic101

you do not have to put it in y = mx + b form to find the y intercept,,,but you can. And if you do, the y intercept will be in the b position

13. mindblast3r

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14. mindblast3r

y=mx + b

15. anonymous

y=2.3x 2.6

16. mindblast3r

ya.

17. anonymous

ok y=5.98

18. mindblast3r

no? how did you get that?

19. anonymous

i multiplyed

20. mindblast3r

that's not how it works.

21. mindblast3r

x doesn't represent multiply in algebra, "x" is a variable.

22. anonymous

oh i got it mixed up

23. mindblast3r

the y intercept is

24. mindblast3r

$\frac{ 7 }{ 3}$

25. anonymous

oh ok thankyou

26. mindblast3r

np if you have any questions ask, i can explain things down to the finest detail so you understand.