Chapter 7 7.1 Slope-Intercept Form Worksheet - Mhr Page 16
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17Marge uses graphing
17.
technology to graph a line. A
table of values for the line is
shown. What is the equation of
the line? Express the equation
in slope-intercept form.
Exposure to cold weather can cause frostbite
18.
Unit Project
and hypothermia. Mountain climbers, sky divers, and other
high-altitude enthusiasts must protect their skin because air
temperature decreases as altitude increases. This rate of decrease
in temperature is nearly constant, up to about 11 000 m.
An airplane taking off in the Yukon Territory recorded the
following temperatures.
Altitude (m)
Temperature (°C)
0
12
Did You Know?
4000
-13.6
8000
The coldest recorded
-39.2
temperature in North
Sketch a straight-line graph of the data.
a)
America was -63 °C on
What is the slope of the line expressed as a fraction in lowest
February 3, 1947. It was
b)
recorded in the village of
terms? What does the slope represent?
Snag, YT. Temperatures
What is the y-intercept? What does it represent?
c)
at higher altitudes can
Write an equation that describes the relationship between
get even colder.
d)
temperature, T, in degrees Celsius, and altitude, A, in metres.
Mount Logan is in Kluane National
e)
Park and Reserve, YT. At a height of
5959 m, Mount Logan is the highest
mountain in Canada. It is the second
highest mountain in North America.
Predict the temperature a climber
would experience at the peak of
Mount Logan on the day that the
airplane collected the data. Assume
minimal wind.
Most people are at risk of frostbite
f)
within 10-20 min of exposure to temperatures
below -20 °C. Predict the altitudes at which the temperature
will be below -20 °C.
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7.1 Slope-Intercept Form • MHR
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