what is the slope of the line joining (4,-8) and (-4,8)?
slope= changey/changex= (8--8)/(-4-4)=16/-8=-2
To calculate the slope of the line joining two points, you can use the formula:
slope = (y2 - y1) / (x2 - x1)
Here, the coordinates of the first point are (4, -8), and the coordinates of the second point are (-4, 8). Let's use the formula to calculate the slope.
slope = (8 - (-8)) / (-4 - 4)
= (8 + 8) / (-8)
= 16 / (-8)
= -2
Therefore, the slope of the line joining (4, -8) and (-4, 8) is -2.