Select ALL the statements about the X-coordinate that are true? (1 Point)
A. The X-coordinate describes the horizontal (left and right) distance from the origin.
B. The X-coordinate describes the vertical (up and down) distance from the origin.
C. The X-coordinate is the first coordinate in an ordered pair.
D. The X-coordinate is the second coordinate in an ordered pair.

A and C

Step-by-step explanation:

X is up and down, and an ordered pair goes (x,y)

correct choice is b

step-by-step explanation:

when you calculate the average rate of change of a function, you are finding the slope of the secant line between the two points. for the function the average rate of change from point to point can be calculated as

to find the average rate of change from day 2 to day 10, note that at day 2, 8 houses were sold, so a(2,8) and at day 10, 2 houses were sold, so b(10,2). thus,

we have three similar triangles, because each has a right angle and shares an angle.   let's write the angles in order: opposite to short leg, long leg, hypotenuse.

cab similar to bad similar to cbd

or as ratios,

ca: ab: cb = ba: ad: bd = cb: bd: cd

we also know

ac = ad + cd

(ad+cd): ab: cb = ba: ad: bd = cb: bd: cd

(ad+cd)/cb=cb/cd

we have cb=6, ad=5 and seek x=cd.

we reject the negative root and conclude x=4

answer: 4