Zoe writes the coordinate pairs(3,5) and (4,8). she then writes a third coordinate pair, but hides its values. zoe says you can look at it and y-coordinate, but not its x- coordinate. will you be able to tell if the three coordinate pairs represent a function? explain.

Step-by-step explanation:

(3,5) , (4,8) , (x,y)

if u cant see the x coordinate, then u cant tell if it is a function.

A function CANNOT have repeating x values...they can have repeating y values, just not the x ones.

Therefore, if u could see x, u would know right away if it was a functionbut if u can only see ywellthats not enough.

just so you knowthe only way those 3 coordinate pairs could be a function, would be if x was any other number besides 3 or 4because if x was 3 or 4, u would have repeating x values

1.4

2.3

step-by-step explanation:

the formula for the constant of variation is

y= kx

divide each side by x

y/x =kx/x

y/x =k

we know a and y

1.   y/x = k

4/1 =4

check the other values to make sure they are the same

8/2 = 4   12/3 =4   and 16/4 =4  

the constant of variation is 4

2.   y/x = k

3/1 =3

check the other values to make sure they are the same

6/2 = 3   9/3 =3   and 12/4 =3  

the constant of variation is 3