I got this question on Khan accadamy so when I check it I will put the answer here too. Which equation has a constant of proportionality equal to 2? Choose 1
(Choice A)

y=\dfrac{10}{5}xy=
5
10

xy, equals, start fraction, 10, divided by, 5, end fraction, x

(Choice B)
B
y=\dfrac{2}{2}xy=
2
2

xy, equals, start fraction, 2, divided by, 2, end fraction, x

(Choice C)
C
y=\dfrac{2}{4}xy=
4
2

xy, equals, start fraction, 2, divided by, 4, end fraction, x

(Choice D)
D
y=\dfrac{22}{2}xy=
2
22

x

Find the domain and range of the following function f(x) = 51x - 21+ 4

Nicole is making carrot bread she needs 5 cups of carrots for 2 cups of sugar.what is the ratio of cups of sugar to cups of carrots that nicole will need? write the ration in three different ways

Each of the following data sets has a mean of x = 10. (i) 8 9 10 11 12 (ii) 7 9 10 11 13 (iii) 7 8 10 12 13 (a) without doing any computations, order the data sets according to increasing value of standard deviations. (i), (iii), (ii) (ii), (i), (iii) (iii), (i), (ii) (iii), (ii), (i) (i), (ii), (iii) (ii), (iii), (i) (b) why do you expect the difference in standard deviations between data sets (i) and (ii) to be greater than the difference in standard deviations between data sets (ii) and (iii)? hint: consider how much the data in the respective sets differ from the mean. the data change between data sets (i) and (ii) increased the squared difference îł(x - x)2 by more than data sets (ii) and (iii). the data change between data sets (ii) and (iii) increased the squared difference îł(x - x)2 by more than data sets (i) and (ii). the data change between data sets (i) and (ii) decreased the squared difference îł(x - x)2 by more than data sets (ii) and (iii). none of the above