# CALCULATING SLOPE M

Calculating slope m :

When the rate of change of a relationship is constant, any segment of its graph has the same steepness. The constant rate of change is called the slope of the line

The slope of a line is the ratio of the change in y-values (rise) for a segment of the graph to the corresponding change in x-values (run).

Let us consider the graph given below.

In the graph given above, for every 3 units of change on x-axis, there is a change of 2 units on y-axis.

So, the slope of the line is

=  Rise / Run

=  2/3

## Slope formula

Let (x₁, y₁) and (x₂, y₂) be the two points on the a line.

Then, the formula to find the slope of a straight line is

## Calculating slope m - Examples

Example 1 :

Find m the slope of the line.

Solution :

Step 1 :

Choose two points on the line.

P(x₁, y₁)          P(x₂, y

Step 2 :

Find the change in y-values (rise  =  y₂ - y₁) and the change in x-values (run  =  x₂ - x₁) as you move from one point to the other.

rise  =  y₂ - y₁     run  =  x₂ - x

rise  =  4 - 2     run  =  -6 - (-3)

rise  =  4 - 2     run  =  -6 +3

rise  =  2     run  =  -3

Step 3 :

m  =  rise / run

m  = (y - y₁) / (x₂ - x₁)

m  =  2 / (-3)

m  =  -2/3

Example 2 :

The graph shows the rate at which water is leaking from a tank. The slope of the line gives the leaking rate in gallons per minute. Find the slope of the line.

Solution :

Step 1 :

Choose two points on the line.

P(x₁, y₁)  =  P(4, 3)

Q(x₂, y)  =  Q(8, 6)

Step 2 :

Find the change in y-values (rise  =  y₂ - y₁) and the change in x-values (run  =  x₂ - x₁) as you move from one point to the other.

rise  =  y₂ - y₁     run  =  x₂ - x

rise  =  3 - 6     run  =  4 - 8

rise  =  -3     run  =  -4

Step 3 :

m  =  rise / run

m  = (y - y₁) / (x₂ - x₁)

m  =  (-3) / (-4)

m  =  3/4

After having gone through the stuff given above, we hope that the students would have understood how to calculate slope m".

Apart from the stuff given in this section, if you need any other stuff in math, please use our google custom search here.

You can also visit the following web pages on different stuff in math.

WORD PROBLEMS

Word problems on simple equations

Word problems on linear equations

Algebra word problems

Word problems on trains

Area and perimeter word problems

Word problems on direct variation and inverse variation

Word problems on unit price

Word problems on unit rate

Word problems on comparing rates

Converting customary units word problems

Converting metric units word problems

Word problems on simple interest

Word problems on compound interest

Word problems on types of angles

Complementary and supplementary angles word problems

Double facts word problems

Trigonometry word problems

Percentage word problems

Profit and loss word problems

Markup and markdown word problems

Decimal word problems

Word problems on fractions

Word problems on mixed fractrions

One step equation word problems

Linear inequalities word problems

Ratio and proportion word problems

Time and work word problems

Word problems on sets and venn diagrams

Word problems on ages

Pythagorean theorem word problems

Percent of a number word problems

Word problems on constant speed

Word problems on average speed

Word problems on sum of the angles of a triangle is 180 degree

OTHER TOPICS

Profit and loss shortcuts

Percentage shortcuts

Times table shortcuts

Time, speed and distance shortcuts

Ratio and proportion shortcuts

Domain and range of rational functions

Domain and range of rational functions with holes

Graphing rational functions

Graphing rational functions with holes

Converting repeating decimals in to fractions

Decimal representation of rational numbers

Finding square root using long division

L.C.M method to solve time and work problems

Translating the word problems in to algebraic expressions

Remainder when 2 power 256 is divided by 17

Remainder when 17 power 23 is divided by 16

Sum of all three digit numbers divisible by 6

Sum of all three digit numbers divisible by 7

Sum of all three digit numbers divisible by 8

Sum of all three digit numbers formed using 1, 3, 4

Sum of all three four digit numbers formed with non zero digits

Sum of all three four digit numbers formed using 0, 1, 2, 3

Sum of all three four digit numbers formed using 1, 2, 5, 6