The correct answer on K12 Quiz is
Construct the perpendicular bisector of AC¯¯¯¯¯ .
Answer:
-7
Step-by-step explanation:
You use the quadratic formula of to get:
a = 1
b = 7
c = -13
then you plug that into x= (-b ± √b²-4ac)/(2a) :
x= ( -7 ± √7²- 4(1)(-13) )/(2(1))
The sum of these two x values turns out to be:
Answer: The equation of the trend line is y = -2x + 24.
First, we need to find the slope. The slope is the change in y over the change in x between the points. Our points move down 4 units while moving right 2 units. So our slope would be -4/2 or just -2.
Second, we need to find the y-intercept. We are lucky because the y-intercept can be see clearly in the graph. It is (0, 24).
We can put the slope and y-intercept together to get the equation:
y = -2x + 24.
It's pretty simple actually, since it's almost completely solved.
4x^2-1=8x (move the 8 to the opposite side)
4x^2-1-8x (now rearrange the order)
4x^2-8x-1 done!
H = 2(A/a+b) is the correct formula