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giordanolucia18
25.12.2019 •
Mathematics
Can someone explain to me on how to find slope on line of fit? (i don't have a problem or worksheet to explain, line of fit is my struggle in math xd)
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Ответ:
If you're given the y intercept, that is one point, (0,a) where a is the y intercept.
If you're given the x intercept, that's another point, (c,0) where c is the x intercept.
You could also be given points on the line that aren't an x or y intercept. Let's call these points (r,s) and (j,k).
To find the slope of the line, you need just two points. Take the difference of the y coordinates, and divide by the difference of the x coordinates to solve for the slope.
Using our two generic points (r,s) and (j,k), we would solve for the slope m as follows:
m = (s-k) ÷ (r-j)
Hope that helped!
Ответ:
Okay, there is another easy steps to do:)
First, you have to pick two line on the graph for example:
(7,8) and (3,4). Then, we just applied to the formula if finding the slope which is:
m=(y2-y1)/(x2-x1) where m is the slope
y2=4
y1=8
x2=3
x1=7
Apply to that same step to get:
m=(4-8)/(3-7)
m=-4/-4
m=1. Hope it help!
Ответ:
Both problems are proportions, so cross multiply in each problem to get rid of the fractions.
41.![\dfrac{9}{x} = \dfrac{12}{21}](/tpl/images/0080/7722/50221.png)
Reduce the fraction in the right side.
Cross multiply.
43.![\dfrac{5}{2} = \dfrac{10}{x - 2}](/tpl/images/0080/7722/e20ce.png)
Cross multiply.