To ensure that she obtained a sufficiently large number of minority respondents in a study on racial attitudes, a researcher divided the people in her population in to four racial groups. she then drew a random sample from each of these groups. what kind of sample is this?

It is stratified random sampling.

Step-by-step explanation:

Stratified random sampling is a method of sampling that involves the division of a population into smaller sub-groups known as strata.

The strata are formed based on members' shared attributes or characteristics, in this case their race.

Stratified random sampling is also called proportional random sampling or quota random sampling

6, 10

9, -13

12, -21

18, -23

step-by-step explanation:

you just add 6 to the x-coordinate and subtract 10 from the y-coordinate.