Writing Equations In Slope Intercept Form Worksheet With Answers Page 36
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50Sample answer: Let y represent the number of quarts of water in a pitcher, and let x represent the time in seconds
that water is pouring from the pitcher. As time increases by 1 second, the amount of water in the pitcher decreases
by
y =
x + 4. The slope is the rate at which the water is leaving the pitcher,
4-2 Writing Equations in Slope-Intercept Form
second. The y-intercept represents the amount of water in the pitcher when it is full, 4 qt.
Linear equations are useful in predicting future events. Describe some factors in real-world
situations that might affect the reliability of the graph in making any predictions.
Linear equations can be use to predict something that has a constant of rate of change. If the problem is about
What information is needed to write the equation of a line? Explain.
To write the equation of a line, you need to know the slope and y-intercept of the line. You can also write the
points on the graph.
Which equation best represents the graph?
y = 2x
y = 2x
The equation that best represents the graph is
, because the slope of the graph moves down one unit and
right two units, or
. So, the correct choice is D.
Roberto receives an employee discount of 12%. If he buys a $355 item at the store, what is his discount to the
nearest dollar?
$3
$4
$30
$43
Page 36
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