Keiko and Eric each randomly surveyed people with cell phones. They recorded peoples'
ages (a years) and how many texts they send per day on average (t texts). For their respective data, they each drew a line of best-fit and determined its equation. They then compared equations and made inferences based only on the equations they calculated.

The younger a person is, the more likely they are to text.

Step-by-step explanation:

Both trend lines have a negative slope, this means that as the independent variable (age) increase, dependent variable (texts) decrease, and vice versa. That is, the number of texts sent increase as age decrease.

the answer is b: 18

step-by-step explanation:

use the pythagorean theorem to .

a^2+b^2=c^2

plug 18 for "r"

the 2 legs are 18 and 24

18^2+24^2=c^2

324+576=c^2

900=c^2

c=30

30-12=18

18 is the radius

: )