A line passes through the points A, B, and C. Find y.
A = (-7,2), B = (8,-14), C = (10,y)
To solve this problem, we first need to find the slope between point A and point B. The formula for the slope between two points (x₁, y₁) and (x₂, y₂) is:
slope = (y₂ - y₁) / (x₂ - x₁)
Substituting the coordinates of points A and B:
The differences in the coordinates are:
So, the slope is:
slope = -16 / 15
Next, we find how much the x-coordinate increases from point B to point C. The increase in x is 2, so the change in y is:
change in y = 2 * (-16 / 15) = -32 / 15
Converting -32/15 to a mixed number:
-32/15 = -2 2/15
Thus, the y-coordinate increases by -2 2/15.
Finally, we add this change to the y-coordinate of point B to find the y-coordinate of point C:
yₓ = -14 + (-2 2/15) = -16 2/15
Converting this to an improper fraction:
yₓ = -11 13/15
Therefore, the y-coordinate of point C is -11 13/15.