Find the slope of this line that passes through (3, 5) and (8,5)
okay, i understand what theyre asking....ive ploted the points, what do i do now????
2007-10-03 09:27:34 · 8 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
The slope of a line is the rise over the run, or (change in y)/(change in x)
so for your line:
(5-5)/(8-3) = 0
2007-10-03 09:33:41 · answer #1 · answered by 1,1,2,3,3,4, 5,5,6,6,6, 8,8,8,10 6 · 0⤊ 0⤋
The General Line equation is :- y = mx + c
Where:-
m = the gradient(slope to be found)
c = the intercept on the y-axis.
y = the y coordinate
x = the x coordinate
The general formula for a gradient(slope) is
[y(1)- y(2)] / [x(1) - x(2)]
were '1' and '2' refer to the two points indicated above.
So m = (5 - 5) / (3 - 8) = 0 / -5 = 0
As the slope is 'zero' it is an horizontal line parallel to the x-axis.
Hence y = 0x + c
Taking one of the points above and substituting in :-
5 = 0(3) + c
but 0 (3) means 0 x 3 = 0
5 = 0 + c
c = 5 the y intercept.
So from the pair of points the equation becomes
y = 5
2007-10-03 16:41:18 · answer #2 · answered by lenpol7 7 · 0⤊ 0⤋
The formula for a slope of a straight line where you know 2 points is (y2-y1)/(x2-x1). However, that formula doesn't work in two cases: when the line goes straight up and down, and when the line is flat from left to right. In the first case, there is no slope. In the second case (which is what your example is), the slope is zero.
2007-10-03 16:36:00 · answer #3 · answered by jklharris2000 2 · 0⤊ 0⤋
slope is 0
it goes up 0 and over 5; 0/5 = 0
or
change in y = 5 - 5 = 0
change in x = 8 - 3 = 5
0/5 = 0
2007-10-03 16:31:54 · answer #4 · answered by sfroggy5 6 · 0⤊ 0⤋
to find the slope, the equation looks like
m = (y2 - y1) / (x2 - x1)
your given points are
1. (3,5) or (x1, y1)
2. (8,5) or (x2, y2)
plug into the equation
m = (5 - 5) / (8 - 3)
m = 0/5
m = 0
your slope is zero which is a horizontal line
and the equation of y-intercept form is
y = mx + b
b is where is crosses the y axis and since it is horizontal it crosses at 5
y = 0x +5
y = 5
this is the equation of that line that passes through the given points
2007-10-03 16:38:18 · answer #5 · answered by Richard B 3 · 0⤊ 0⤋
> what do i do now????
You find the slope. The slope is a number: they want you to calculate what that number is.
The slope is found by taking any two points on the line, (x1,y1) and (x2,y2), and doing this calculation:
slope = (y1 - y2) / (x1 - x2)
Since they've already told you two points that are on the line, the calculation should be easy.
2007-10-03 16:34:39 · answer #6 · answered by RickB 7 · 0⤊ 0⤋
m = (y2 - y1)/(x2 - x1) = (5 - 5)/(8 - 3) = 0
It's a horizontal line. The slope is zero.
2007-10-03 16:32:21 · answer #7 · answered by PMP 5 · 0⤊ 0⤋
there is no slope its a vertical line so your slope would be 0
2007-10-03 16:33:06 · answer #8 · answered by theintimadator85 1 · 0⤊ 1⤋