What does equation of line mean?

Definition: A straight line on the coordinate plane can be described by the equation. y = mx+b. where m is the slope of the line and b is the intercept.

What is the equation for horizontal line?

Horizontal lines have a slope of 0. Thus, in the slope-intercept equation y = mx + b, m = 0. The equation becomes y = b, where b is the y-coordinate of the y-intercept.

How many ways are there to write an equation of a line?

There are three major forms of linear equations: point-slope form, standard form, and slope-intercept form.

What is equation of straight line?

The equation of a straight line is usually written this way: y = mx + b. (or “y = mx + c” in the UK see below)

What is the Y intercept in an equation?

The equation of any straight line, called a linear equation, can be written as: y = mx + b, where m is the slope of the line and b is the y-intercept. The y-intercept of this line is the value of y at the point where the line crosses the y axis. © 2000-2005 Math.com. All rights reserved.

How do you write an equation for a vertical and horizontal line?

Horizontal lines go left and right and are in the form of y = b where b represents the y intercept. Vertical lines go up and down and are in the form of x = a where a represents the shared x coordinate of all points.

What is an example of a horizontal line?

An equation that only crosses the y-axis is a horizontal line. For example: y=5 is a horizontal line that crosses the y-axis at (0,5).

What is the equation of the horizontal line through 1 9?

Answer. Answer: y-9 = 0 ( or ) y= 9 is the correct equation.

What are two things we need to write an equation of a line?

from 2 points on the line, you can calculate the slope and then, using one of the points, can determine the equation. (x1,y1) is one point on the line. (x2,y2) is the other point on the line. once you know the slope, you can use either the point slope form or the y intercept form to generate the equation of the line.

What’s a standard form?

Standard form is a way of writing down very large or very small numbers easily. So 4000 can be written as 4 × 10³ . This idea can be used to write even larger numbers down easily in standard form. Small numbers can also be written in standard form.

What is the equation of the blue line?

The blue line is the translate in the x direction of the red line by 4, and therefore has equation y=3(x−4)+5 or y=3x−7.

What is called straight line?

straight line – a line traced by a point traveling in a constant direction; a line of zero curvature; “the shortest distance between two points is a straight line” line – a length (straight or curved) without breadth or thickness; the trace of a moving point.