Points POSSIDE SU
Date: 22720
Answer the following questions using what you've learned from this unit. Write your answers in the
ce provided. Be sure to show all work.
UNDERSTANDING STATISTICAL STUDIES
1. A biology class designed a study to see whether coffee drinkers or non-coffee drinkers remember
names better. 50 teachers were randomly selected. Some of the teachers who were selected drink
coffee and some do not. They were given the same list of student names to study and asked to recall as
many as possible.
Part A. Is this an observational study or an experiment? Explain. (2 points)

the reporter's right

step-by-step explanation:

1/4 = .25 / 25%

c. y = 1/4 x + 5

step-by-step explanation:

first, put the equation of the line on the graph into slope-intercept form

(y = mx + b):   y = -4x + 8

second, a perpendicular line has to have "an opposite/reciprocal slope" to the original slope. so, find the "m" value in your original equation (it's -4, right? )

original slope: m = -4   perpendicular slope: change the sign to its opposite and find the reciprocal ("flip" the number)

new slope is now positive (b/c the original slope was negative 4), and it's 1/4 (not the original slope of 4 or 4/1)