## anonymous one year ago What is the graph of the equation? -5x+y=-3 I don't know what to do, help?

1. Owlcoffee

You can give any arbitrary number to "x" and solve for "y", for at least two points on the graph, if you join the points you'll obtain the graph of that line.

2. anonymous

I'm sorry could you explain just a bit more? if thats possible

3. anonymous

I can use -5 for x right? But how would i go about solving y.. Thank you btw I'm sorry im so confused haha

4. Owlcoffee

Say for instance, We consider x=-5, then: $-5(-5)+y=-3$ Now, we just operate: $25+y=-3$ $y=-28$ So, therefore, the point "w", as we can call it, belongs in the line whose equation is given, if you represent this point on the cartesian plane, and repeat the process for another value of "x", then join the points, you'll obtain the graph of the line. $w(-5,-28)$

5. skullpatrol

-5x + y = -3

6. triciaal

another more direct approach let y be the subject

7. skullpatrol

Have you learned the form y = mx + b

8. anonymous

Yes.

9. skullpatrol

y = 5x -3

10. triciaal

when x = 0 y = -3

11. skullpatrol

I added 5x to both sides :-)

12. anonymous

Would it be positive or negative?

13. skullpatrol

Does that make sense?

14. anonymous

Yes it does, I have 2 answer choices that could work i just need to figure out if its negative or positive

15. skullpatrol

5x + (-5x) = 0

16. imqwerty

ok i'll tell a simpler way

17. anonymous

18. skullpatrol

What do you want to know is positive or negative?

19. anonymous

The line on the graph

20. skullpatrol

The slope is positive because the 5 in 5x is positive.

21. imqwerty

if u have something like this- ax+by=c then just divide all over by c $\frac{ ax }{ c }+\frac{ by }{ c }=\frac{ c }{ c }$$\frac{ x }{ \frac{ c}{ a }}+ \frac{ y }{ \frac{ c }{ b } }=1$ calculate c/a and c/b and (c/a, 0)=point where the graph cuts x axis (0,c/b)=point where graph cuts y axis so basically just identify a,b,c and then find the points then join them and thats ur graph

22. skullpatrol

Do you understand what slope is?

23. imqwerty

@mickey1513 did u get my method?

24. anonymous

So, its going to be positive

25. anonymous

yay it was right. thank you i get it now all of you deserve medals

26. imqwerty

well thr best way was like what owl said u jst take some random value of x and get y and plot that point then u take another random value of x and put it in equation nd get y and pot this point and then join these 2 points

27. skullpatrol

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