Color
Experimental Probability
frequency of the event = 12 = 2
Substitute the results
recorded in the table.
You can also write each
probability as a decimal
or as a percent.
Red
total number of trials = 50 = 25
STEP
Blue
frequency of the event_10_1
total number of trials 50
Green
frequency of the event
total number of trials
Yellow
frequency of the event_13
total number of trials 50
O Houghton Mifflin Harcourt Publishing Company
o Houghton Mifflin Harcourt Publishing Company
STEI
Reflect
6. Communicate Mathematical Ideas What are two different ways you
could find the experimental probability of the event that Martin does
not draw a red marble?

55.44 inches

step-by-step explanation:

part a. assuming a perfectly linear relationship, we can find the slope from the first two data points.

slope = m = (change in rainfall)/(change in years)

= (61.80 -62.33)/(2005 -2004) = -0.53/1 = -0.53

then the point-slope form of the equation of the line can be written as

y = m(x -h) +k . . . . . m = -0.53, (h, k) = (0, 62.33)

y = -0.53x +62.33 . . . x = years after 2004

part b. in 2017, x = 2017 -2004 = 13. then the predicted rainfall is

y = -0.53·13 +62.33 = 55.44 . . inches

the predicted rainfall in 2017 is 55.44 in.

point form: (-3,-1)

equation form: x=-3 y=-1

step-by-step explanation: