Which is an equation of a function that passes through the points (-1,2) and (1,4.5) 1. y=1.5x+3
2. y=3x+1.5
3. y=3(1.5)^x
4. y=1.5(3)^x

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

if you need , reply with more info. u.

hm let me think hm think think hm think yes