To answer this question, locate the value -1 on the horizontal line labeled <em>x</em>. Follow the vertical line through that point down until it reaches the curve. (There is a convenient dot on the curve at that point.)
Then, follow the horizontal line to the right to see what the y-value is for that dot. Here, it is -2. This means ...
... the value of y when x is equal to -1 is ...
... -2 . . . . . . . . the third choice
We have given the 2 by 2 frequency table.
The probability that a randomly selected book is a nonfiction paperback =
(Number of nonfiction paperback books) / Total number of books
= 23 / 69
= 0.3333
The percentage of nonfiction paperback books is 33.33%
Okay, your function rule is:
Where 'x' is number of hours and 'y' is the depth of the snow on the ground.
There are 10 hours between noon and 10 P.M., so let's plug this in for 'x' in the function:
Add:
So the snow will be 23 inches deep when the news airs at 10 P.M.
Let Lisa's height be x, Ian's be y and Jim's be z
x = 10 + y . . . (1)
y = 14 + z . . . (2)
y + 14 + z + 14 = 170 + x + 14
y + z - x = 170 + 14 - 28 = 156 . . . (3)
From (2), z = y - 14 . . . (4)
Putting (1) and (4) into (3) gives,
y + y - 14 - 10 - y = 156
y = 156 + 24 = 180
Therefore, Ian's height is 180 centimeters