Line AB contains points A (-1, 3) and B (5, 3). Line AB has a slope that is
A. Zero
B. Undefined
C. Positive
D. Negative
is it "D"?
Since both have y=3, the slope is zero
But how about the -1?
what about it?
If both points have the same y-coordinate, the line is horizontal. Does not matter what the x-coordinate is.
ALL points on the horizontal line y=3 are of the form (x,3) no matter what x is.
THANK YOU!!
To find the slope of a line passing through two points, we can use the formula:
slope = (change in y) / (change in x)
In this case, the two points are A (-1, 3) and B (5, 3). Let's calculate the change in y and change in x.
change in y = y2 - y1
change in y = 3 - 3
change in y = 0
change in x = x2 - x1
change in x = 5 - (-1)
change in x = 6
Now, let's calculate the slope:
slope = (change in y) / (change in x)
slope = 0 / 6
slope = 0
Therefore, the slope of line AB is 0.