# Two Different Forms of Equations: Slope-Intercept Form and Point-Slope Form

The slope-intercept form is a way to represent linear equations. They are usually written in the form y=mx+b. M is the slope, which gives us information on how steep or gentle an equation will be, and b is just where your line crosses the y-axis.

Linear equations are generally used for growth models that show an increase or decrease over time. One of these best represents growth is exponential growth. It occurs when there is a proportional change over time, meaning growth increases by the same percent every year. The following example uses numbers close to scientific notation to have accurate results:

Example 1: If an apple tree grows 5 apples each day for 10 days, what would it grow during day 11?

Day 11 apples = 5(11) = 55 apples.

The point-slope form is another way to represent linear equations. It’s written in the form y-y1=m(x-x1), where m is the slope and (x1,y1) are the coordinates of any point on the line. If you were to use this equation to make a graph, it would be a straight line because m will always equal 1.

If x=4 and y=3, then there would be one ordered pair for your line: (4,-3). The slope of this line would be -3/4=-9/4=2/2=1. So, if you wanted to find out how many feet away some point was, if its y coordinate were 2 feet higher than the previous point, you would add 2 to both sides of the equation.

-2+y1=-3/4*2+x1 = -5/4 + x1 = -3+x1

## Properties:

• A positive number in front of the slope means a line is going up from left to right.
• A negative number in front of the slope means a line is going down from left to right.
• The bigger the absolute value of the slope is, the steeper it will be.
• If a line goes straight up or straight down, its slope will be undefined (which means that mathematically we can’t have an equation for that situation because you would also need a y coordinate).

## Uses:

• Can be used to find the coordinates of a new point based on some other point (like in geometry).
• Ideal for growth models that show change over time.
• Used in physics often when dealing with things like velocity and acceleration.

## A real-life example of slope intercepts form:

For all medical students, slope-intercept form is important in their careers because this type of equation allows them to find the amount and rate of change in a population. Kappa statistics can be used to measure how well two variables correlate with each other. The parameter “kappa” is also known as Cohen’s kappa, Intraclass correlation coefficient, or reliability coefficient. This value tries to determine whether any agreement between judges (such as medical doctors) is better than chance alone would predict. It does this by comparing the difference between the averages of two judges by using slope-intercept equations [the concept of Cohen’s kappa].

## A real-life example of the point-slope form:

A more common example of the point-slope form is a carpenter looking for the equation of a straight line. He knows that his tools are 1 meter long and he has to make a line from one wall to another, but he doesn’t know where. If the distance from the wall to the tool is x, then y will be equal to 1/x since it’s an ordered pair. This forms the equation y=1/x which lightly touches (but does not cross) the x-axis at (0,1). Even though this isn’t useful by itself, it can be used in combination with other equations. For example, if you had two points on your line already (like (-2, 3) and (3,-6)), you could use the slope-intercept form to find the third point. The terms of your equation would be 3-2=1 and -6+3=-3, so your equation is y=-3/x.

y=-mx+b

## Point Slope Form:

y-y1=(m(x-x1))

These are some basic information on different forms of equations, and if one wants to explore more mathematical concepts, they can check the Cuemath website. If you are looking for download the latest movies for free, you can download free movies from Tamilmv. And You can also download free movies from PagalMovies 