does this function have a negative or positive rate of change?

15x + 5y = −30

Question

does this function have a negative or positive rate of change?
	
15x + 5y = −30

mysticfury · Answer

@Photon336

igreen · Answer

Convert to slope-intercept form. Do you know how?

mysticfury · Answer

nope @iGreen i imagined thats what i had to do

photon336 · Answer

well for starters, think of it as any equation. you want to get y by itself how do you do that?

mysticfury · Answer

-5 from both sides? @Photon336

photon336 · Answer

$$15x+5y = -30$$

photon336 · Answer

We've got to get y by itself, we do this by subtracting 15 from both sides. 

$$5y = -30-15x $$

photon336 · Answer

@MysticFury

mysticfury · Answer

oh okay so i was close

photon336 · Answer

then what do we do?

mysticfury · Answer

5y = 15x?

photon336 · Answer

so  it's 5y = -30-15x

photon336 · Answer

but we're not done yet

mysticfury · Answer

umm idk subtract?

mysticfury · Answer

@Photon336

mysticfury · Answer

@iGreen @UliNK @Michele_Laino

mysticfury · Answer

@KamiBug

mysticfury · Answer

please help @AloneS and @UliNK this is my last question

ulink · Answer

@MysticFury I honestly have no idea.

mysticfury · Answer

okay thanks anyway @UliNK

ulink · Answer

I wish I could be of some help, but I am not good at Mathematics.

ulink · Answer

Sorry ;(

mysticfury · Answer

i said its okay @UliNK

alones · Answer

Okay i don't really understand but i solved it out 
Let's solve for x.
15x+5y=−30
Step 1: Add -5y to both sides.
15x+5y+−5y=−30+−5y
15x=−5y−30
Step 2: Divide both sides by 15.
15x/15=−5y−30/15
x=−1/3   y−2

mysticfury · Answer

thanks @AloneS but i kinda need it in slope intercept form

alones · Answer

i think IT should hep then :3 https://www.desmos.com/

mysticfury · Answer

lol @AloneS i already tried that program XD

alones · Answer

Hrmm okay..i'm not sure then how should i help.. so you say you need this as intercept form?

ijlal · Answer

Do you know the standard form of a straight line equation is y=mx+c right?

mysticfury · Answer

yes but i need slope intercept form not standard form @ijlal

ijlal · Answer

just rearrange your equation in that form that is 15x+5y=-30 rearrange it into y=mx+c you will get ur intercept and slope :)

mysticfury · Answer

it dosent matter i didnt pass it anyway

ijlal · Answer

15x+5y=-30 
5y=-15x-30 
y=-6x-5 understand till here

ijlal · Answer

compare this equation with y=mx+c the term with x is the slope and the constant is the intercept

ijlal · Answer

@MysticFury

ijlal · Answer

and sorry a bit miscalculation by myself y=-6x-3 not y=-6x-5