Respuesta :
Answer:
- slope: -4/3
- y-intercept: (0, 4)
- x-intercept: (3, 0)
- y = -4/3x +4
Step-by-step explanation:
Given two points, the equation for the line through them can be found using the slope formula and the slope-intercept form.
The slope formula is ...
m = (y2 -y1)/(x2 -x1)
m = (4 -(-4))/(0 -6) = 8/-6 = -4/3 . . . . slope of the line
The y-intercept is 4, given by the second point.
The slope-intercept equation for a line is ...
y = mx +b . . . . . . line with slope m and y-intercept b
y = -4/3x +4 . . . . . line with slope -4/3 and y-intercept 4
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The x-intercept can be found by solving for x when y=0.
0 = -4/3x +4
0 = 4x -12 . . . . multiply by -3
0 = x -3 . . . . . . divide by 4
3 = x . . . . . . . . subtract 3
The x-intercept is (3, 0).
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The line can be graphed by plotting the given points and drawing the line through them.
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Answer:
Slope: [tex]-\frac{4}{3}[/tex]
Y int. : (0,4)
X int. : (3,0)
Step-by-step explanation:
Equations to remember:
[tex]y = mx + b\\\\\frac{y_{2}-y_{1} }{x_{2}-x_{1}}[/tex]
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[tex](x_{1}, y_{1}) = (6, -4)\\\\(x_{2}, y_{2}) = (0,4)[/tex]
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SLOPE
You want to set up your equation for finding slope like this:
[tex]\frac{4 - (-4)}{0 - 6}[/tex]
4 - (-4) will become 4 + 4. This is because there is a -1 in front of the parenthesis.
A negative number times a negative number will always equal a positive number.
[tex]-\frac{8}{6}[/tex]
when simplified/divided by 2, which is the number you want:
[tex]-\frac{4}{3}[/tex]
This is your slope or your m in y = mx + b
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Y INTERCEPT
Use one of your points.
I'll use (0,4) as an example.
Set up your equation like this:
[tex]4 = -\frac{4}{3}(0) + b[/tex]
Since your slope is being multiplied by ZERO, you can just eliminate your mx or slope.
This means that 4 = b!
That's your Y Int, which you'll find was one of the given points, (0,4).
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From there, if you use a graph, you should find that your X Int is (3,0).
I hope this helped you!
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