1. What is your y intercept for the equation
y=1/2x-3?

-3

Step-by-step explanation:

Rewrite in slope-intercept form.

The slope-intercept form is  

y=  m x  +  b

, where  m  is the slope and  b  is the y-intercept.  

y =  m x  +b

Combine   1 /2  and  x .

Rewrite in slope-intercept form.

y  = 1  /2  x = − 3

Using the slope-intercept form, the y-intercept is  − 3 .

b  =  − 3

85.560%

step-by-step explanation:

conditional probability is defined as:

p(a|b) = p(a∩b) / p(b)

in other words, the probability that a occurs, given that b has occurred = the probability that both a and b occur / the probability that b occurs.

in this example:

p(turns 64 | turns 44) = p(turns 64 & turns 44) / p(turns 44).

if someone turns 64, they must have already turned 44, so:

p(turns 64 | turns 44) = p(turns 64) / p(turns 44)

on page 42, we see that of the original 100,000, 94944 turn 44, and 81234 turn 64.   therefore:

p(turns 64 | turns 44) = 81234 / 94944

p(turns 64 | turns 44) = 0.85560

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step-by-step explanation: