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Julli [10]
3 years ago
12

How to find slope? I'm confused on using y=mx+b

Mathematics
2 answers:
Anna007 [38]3 years ago
6 0

Answer:

\frac{y_{2}-y_{1} }{x_{2}-x_{2}}

Step-by-step explanation:

By definition, the slope of a line is the change in y values divided by the change in x values. In other words, "rise over run". If you have any two points on a line, use this formula:

(x1,y1) and (x2,y2) are any two points on a line, to find slope (y2-y1)/(x2-x1).

NOTE: (x1,y1) and (x2,y2) are interchangeable, just make sure you are consistent with using a matching ordered pair.

In the form y=mx+b, m is the slope.

Hope this helps!

Mumz [18]3 years ago
4 0
Slope is mx is that makes sense
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Answer:

13 pencils.

Step-by-step explanation:

Let x be the pens and y be the pencils

Given:

Brian purchased pens for 75 cents each and pencils for 40 cents each he bought total of 22 writing utensils for $11.95.

Total pens and pencils is 22

So, x+y=22----------------(1)

And he bought all utensils for $11.95. and each pen for 75 cents and pencils for 40 cents.

0.75x+0.40y=11.95------------(2)

solve equation 1 and equation 2 for x and y.

From equation 1.

x+y=22

y=22-x----------------(3)

put y value in equation 2.

0.75x+0.4(22-x)=11.95

0.75x+0.4\times 22-0.4x=11.95

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0.75x-0.4x=11.95-8.8

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x=\frac{3.15}{0.35}

x=9

Now substitute x value in equation 3.

y=22-9

y=13

So, he buy 13 pencils.

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3 years ago
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