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Slope Video

Added Jan 28, 2015 •

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A good video to review slope and y-intercept

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party this is she coming to you from beautiful Atascocita Texas and today I'm bringing you an algebra lesson on slope the slope is very important Khan not only an algebra but also in science you will use sloping chemistry and physics and calculus this is especially true for calculus because calculus Foundation the derivative is based on slope therefore knowing how to work with and find slope is essential in this can you learn how to correctly set up a graph what the definition of slope is where the y-intercept is and how do you use the slope intercept form let's start with what makes a good graph every good graph has straight lines so use a ruler free hand lines just don't what it a good grass has the x-axis and the y-axis label and every good graph has a proper scale the slope of a line is a ratio it is the comparison of the changing Y and the change of X the equation of this ratio is Delta y over Delta X or the change in 1 / the change in x many people in an effort to remember this equation refer to slope as the rise over the Run however you need to know the meaning if you're going to master its applications  so learn what soap actually means and remembered that change means you are going to have a difference that is shelter why means why should two- why someone and Delta X means X2 - X1 all the ships is the ratio of the distances between the coordinates of the points but it has many uses in the mathematical and scientific world tyr is the y-coordinate of the point intersects the y-axis and its x coordinate is always finding the Y intercept is easy but don't let that fool you it is very important let's try finding a slope there's our equation let's pick a couple of points and turn on the graph I'm going to pick for 7  and -2 won  now enter the coordinates into the equation there's a change in what and the change in x  and the answer is one show the slope is 1 now it's fine the y-intercept in writing equation for this line Y equals mx + b is the slope intercept formula the slope is 1 the y-intercept is 3 so the equation is y equals 1 + 3 or Y equals X plus 3 okay time for recap the slope is the ratio of the change in y and the change in X the Y intercept is the y-coordinate of the point that intersects the y-axis and the slope intercept form is y equals MX plus b all right let's look at how do you slow and do a couple of examples example 1 find the slope of the line passes through the following two points -3 for  and five- to First write up the slope formula for the two points next filling the coordinates  and the answer is -3 Force the sugar answer by graphing draw the axes place of points and draw a line through the points now draw the change in y and the change in X and you get -6/8 just as we calculate  example find the equation of this line  well we need a plan so first choose two points next find the slope then find the y-intercept and finally write the equation in slope intercept form let's choose 3 + -2 + -3 + 0 as our points and then put the points into the slope formula can you get negative one third Now find the y intercept the y-intercept is -1 set the equation for this line is y equals negative one third x -1 if you have any questions office video send an email to miss Class A mr. coffee. And have a great day everybody

Uploaded by Heather Avera.

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Slope Video

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