A few days ago
rebecca r

how would I find the slope and y-intercept?

of f(x)= -3/5x + 12

and

-5y – 2x=7

can you please explain, I have a test tomorrow and need to know! =/

Top 5 Answers
A few days ago
Kim

Favorite Answer

Those need to be put in y=mx+b slope intercept form. M is the slope and b is the y-intercept. The first one already is in slope intercept form, so -3/5 is m which is the slope, and 12 is the y-intercept because it’s b. For the second one, put it in slope intercept form so it would be y= -2x/5 – 7/5. So the slope would be -2/5 and the intercept would be -7/5
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A few days ago
gateach
Slope intercept form: y = mx + b, where m = slope and b = y-intercept

f(x) = y

y = -3/5x + 12

slope= m = -3/5

y-intercept= b = 12

-5y – 2x = 7

First rewrite in slope intercept form (get y on the left side by itself)

-5y = 2x + 7

y = -2/5 x – 7/5

slope = m = -2/5

y-intercept = b = -7/5

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A few days ago
Tip 🙂
(1)slope= -3/5x

y-intercept=12

Y=mx+b

m(which is always closest to the x ) is the slope

b(which always has either a + or – in front of it)is the y-intercept.

(2) -5y-2x=7

first you add -2x to the opposite side(next to 7). You do this because you have to get y by itself and you have to add the opposite to the number so that they cancel each other out (like -1+1=0 or 4-4=0)

then your problem should look like this: -5y=2x+7.

then you divide -5 on both sides(because the opposite of multiplication is division, and you do this to cancel out the -5 so that y is by itself)

Now, you problem should look like this: y=-2/5x-7/5. Once your problem looks like this repeat the steps of number one, and your answer should be: slope= -2/5x, y-intercept=-7/5 (or -1.4)

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A few days ago
ae_los3r
okay. slope is the coefficient of x. yeah so f=3/5x+12,

3/5 is the slope because it is with x (its the coefficient).

12 is the y intercept because it is where the line crosses or touches the y-axis

I am not sure about the second equations so I will leave that to somebody else

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A few days ago
js4565
idk about the first one but in the second one

*add 2x to each side

-5y=2x+7

*divide each side by-5

y= -2/5x-1.4

slope_ -2/5 y int._ -1.4 or -7/5

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