Wednesday, April 17, 2013

Learn Online Slope Form

Introduction to learning slope form - online

In mathematics, learning slope means the slope or gradient of a line describes its steepness, incline, or grade. A higher slope value indicates a steeper incline.

The slope is defined as the ratio of the "rise" divided by the "run" between two points on a line, or in other words, the ratio of the altitude change to the horizontal distance between any two points on the line. Given two points (x1,y1) and (x2,y2) on a line, the slope m of the line is

m = (y2 - y1)/(x2-x1)

Through differential calculus, one can calculate the slope of the tangent line to a curve at a point.

The concept of slope applies directly to grades or gradients in geography and civil engineering. Through trigonometry, the grade m of a road is related to its angle of incline ? by. (Source: From Wikipedia)

Here we are going to learn about the slope form in online. Please express your views of this topic What is the Slope Formula by commenting on blog.


Learning formulas and examples for slope form:


General form of equation:

Y=mx+b

where:

Y and X are co-ordinates, b is a constant

Types of slope forms

Point slope form

Equation of line passing through a point (x1,y1) is

y-y1 = m(x-x1)

where:

X and Y are co-ordinates

X1, Y1 – point, M is slope

Online Example problem:

Ex 1:      Find the equation of the straight line with the purpose of has slope m = 4 and passes through the point (1, –6).

Sol :       The slope intercept form of an straight line is y,m,x and b is y-intercept. Slope and the value x and y from this particular point, solve for b.

y = mx + b

(–6) = (4)(1) + b

–6 = 4 + b

–2 = b

Then the line equation must be "y = 4x – 2"

Ex 2:  Find the equation of line passing through point (3,2) and slope -1/2 ?

Sol :   Given:       Point (3,2)

x1=3,y1=2

M= -1/2

Equation of line passing through point is

Y-y1 = m(x-x1)

Y-2= -1/2(x-3)

2(y-2) =-1(x-3)

2y-4 = -x+3

2y = -x+7

y = -x / 2+7 / 2

Ex 3:   Determine the equation of the line (write in slope- intercept form) passes through (1, 3) with a slope 1/4.

Sol :    y - y1 = m ( x - x1 )

It goes through the point (1,3) and has a slope of 1/4.  So appropriate this information to the point-slope formula gives:

y - 3 = 1/4(x - 1))
y - 3 = 1/4(x - 1)
y - 3 = x/4 - 1/4
y = x/4 - 1/4 + 3
y = x/4 - 1/4 + 12/4
y = x/4 + 11/4
The final equation is in slope-intercept form, which is y = mx + b, where m is the slope and b is the y-intercept.

I have recently faced lot of problem while learning Discriminant Formula, But thank to online resources of math which helped me to learn myself easily on net.

Some practice problems for learning slope form


Q 1:   Find the slope of the line that passes through the points (-1, 2) and (4, 8).

Answer: y = 2x + 4

Q 2:   Find the equation of the straight line which have slope m = 4 and passes through the point (–2, –6).

Answer: y = 4x + 2

Q 3: . What is the slope of the line parallel to the line in which the equation is given by 5x – 6y = 3?

Answer: y = 5x / 6 – 1 / 2.

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