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What is the slope of (-5,3) (-3,1) (2,-4) - Office Equipment & Supplies

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-1 (negative one).

If this is homework, be sure to show your work.

Posted on Oct 20, 2013

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Posted on Jan 02, 2017

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The slope of a line through 5 -5 and 5 0


It's a vertical line so the slope is infinite.

Mar 29, 2017 | Homework

1 Answer

What is the slope and y intercept of -2,1 and 5,-5


slope or m = (y2 -y1)/(x2-x1)
always start with the same point.

m = (1 - (-5))/(-2-5)
m = (1 + 5)/(-7)
m = 6/-7
m = -6/7

The y-intercept is the b in the equation y=mx+b.
We can use either point to calculate b. Let's use (-2,1). So every time we see x, we put in -2, and every time we see y, we put in 1.

y = -6/7x + b
1 = -6/7 (-2) + b
1 = 12/7 + b
1 = 1 5/7 + b
-5/7 = b
So, y = -6/7x - 5/7

To check, we substitute in the other point and see if the left side is equal to the right side.

LS RS
-5 -6/7(5) - 5/7
-5 -30/7 - 5/7
-5 -35/7
-5 -5
LS = RS
QED


Good luck,

Paul

Mar 23, 2017 | Homework

1 Answer

A line with a slope of - 1 7 passes through the points u, - 1 and 5, - 3. What is the value of u?


Slope is usually designed by the letter m. m=delta y/delta x or change in y/change in x or (y2-y1)/(x2-x1).
What we know.
m = -17 (very very steep, with a negative slope, going up to the left)
Point (5, -3)
Point (u,-1)

Putting everything into the above equation, we get
m = (-3-(-1))/(5 - u) , where m =-17
-17 = (-3 + 1)/(5 - u)
-17 = (-2)/(5-u)
To get rid of the fraction, multiply both sides by (5 - u)
-17(5-u) = -2
-85 + 17u = -2
Add 85 to both sides to get rid of the -85.

-85 + 85 +17u = -2 + 85

17u = 83
Divide both side to get u by itself.

17u/(17) = 83 / 17

u = 4.89 (rounded to 2 decimals)

Good luck,

Paul

Oct 24, 2016 | Office Equipment & Supplies

1 Answer

Write an equation in slope intercept form that passes through -4,-6 and is parallel to y=-5x+1


Let's break this down into a few parts first.

Slope intercept form is otherwise known as y = mx + b, where m is the slope and b is the y-intercept.
Parallel means that the two lines will never meet. They are parallel to each other. In math terms, their slopes are the same, so the m values must be the same.

Starting with y = -5x + 1, putting into slope intercept form, y = mx + b, m = -5 and b=1.

Since it is parallel, it must have the same slope and the m values are the same.

So, y = -5x + b, but we don't know what the value of b is. To determine this, we know the point (-4,-6) is on the line that we are trying to find, so we can substitute it into the equation and calculate b to make it work.

Every time we see an x we put in -4 and every time we see a y, we put in -6.

-6 = -5(-4) + b
-6 = 20 + b
subtract 20 from both sides
-6 - 20 = 20 + b - 20
-26 = b
Now substitute this into the equation.

y = -5x + -26
Putting it into correct form, we get y = -5x - 26.

Let's check it to see if it is correct.

It has a slope of -5, so it is parallel to y=-5x + 1

Is the point (-4,-6) on the line? Let's substitute it in to see if it is on the line.

Again, everywhere we see an x, we put in -4 and everywhere we see a y we put in -6.

-6 = -5(-4) - 26
-6 = 20 - 26
-6 = -6

Sorry for the very long explanation, but after you do a few of them, you will be able to knock them off in minutes.

Good luck,

Paul

Apr 03, 2016 | Office Equipment & Supplies

1 Answer

Slope and y intercept


Simplify and put it into slope-intercept form:
y=9x-15

From the above the slope is readily seen to be 9 and the y-intercept is -15.

If this is homework be sure to show your work.

Nov 19, 2013 | Computers & Internet

1 Answer

How do I find the slope of this lines on the TI-89? 3x-5y=1


Solve for Y first.
y= (1-3x)/-5
Then plug in a number for x and you'll get a Y value.
x= 0 y =-1/5
x1=1 y1= 2/5

(y-y1)/(x-x1) = m
m= your slope.
On that calculator you would do it the same way but graph it 1st and then pick to values that are easier to work with.

Nov 04, 2010 | MathAid Algebra II

1 Answer

THE POINTS L(4,0),M(10,0),AND N(7,5) FROM LMN.WHAT IS THE SUM OF THE SLOPES OF THREE SIDES OF THE TRIANGLE


slope of side lm by applying slope =(y2-y1)/(x2-x1)


slope of lm=0

slope of mn=5/-3 = -5/3


slope of ln= 5/3


so sum of slopes =0

Apr 06, 2010 | SoftMath Algebrator - Algebra Homework...

1 Answer

How do i find the slope of a line


difference in y (Y2-Y1) divided by difference in x (X2-X1). Example: 1st point (5,3) and second point (10,6) means subtract 3 from 6 (2nd y value from first)= 3- this is your numerator. now subtract second X value from firt X value (10-5)= 5; this is the denominator. the slope (m) is 3/5 or .6

Mar 15, 2009 | Texas Instruments TI-85 Calculator

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