Plz will give

a teacher would like to estimate the percentage of her students who play chess.

which method should the teacher use to select the sample?

use a computer to randomly select 30 student ids from all her students

select every other student in her classes until she has selected a total of 30 students

use a computer to randomly select 30 student ids from all students

select all students who are currently in the chess club

3.4 pizzas

step-by-step explanation:

given is a scatter plot showing number of pizzas sold during weeks for different issues of coupon

y represents number of pizzas sold and x number of coupons issued

y is marked verticaly and x horizontally

the trend line is given as

y =3.4x+43

this says that even when no coupon is issued pizzas sold will be 43

and rate of change of pizza sold for 1 unit of coupon = slope = 3.4

i.e. when x increases by 1 unit y increases by 3.4 units

hence for each additional coupon issued 3.4 pizzas more will be sold

yes yes yes yes yes yes yes yes yes