Heather is training for a long-distance run. her data points listed below represent the days of practice, x, and the number of miles run, y.

(1, 2.5), (2, 4.2), (4, 5.6), (6, 7), (8, 8.1), (10, 11)

use the equation to interpolate the value and estimate the distance that she could have run on day 3. round to the nearest tenth of a mile.

day 3 ≈
miles

hdjd

step-by-step explanation:

a 4/6 = 9/12   not proportional

step-by-step explanation:

to find which are not proportional, we can use cross products

if it is true, they are proportional.   if it is not true, they are not proportional.

a 4/6 = 9/12

4* 12 = 6*9

48 = 54

not this is not proportional  

b 2/3 = 12/18  

2* 18 = 3 * 12

36 = 36

this is proportional

c 5/4 = 10/8  

5*8 = 4*10

40 = 40

this is proportional

d 7/5 = 35/25

7*25 = 5 * 35

175 = 175

is proportional

60%