8.SP.3
Presentation
•
Mathematics
•
8th Grade
•
Practice Problem
•
Medium
Standards-aligned
Derrick Routon
Used 15+ times
FREE Resource
4 Slides • 7 Questions
1
8.SP.3
2
The formula
y=mx + b
m is the rate of change - the slope
x is the number that you substitue values into - its the multiplier
b is the y-intercept - the initial value
3
Multiple Choice
What does the m in the equation y=mx + b represent?
slope
initial value
multiplier
4
Multiple Select
What does the b in the equation y=mx + b represent? Select all that apply.
slope
y - intercept
initial value
multiplier
5
What to look for in the word problems?
Look for initial value
Look for the rate of change or slope
Look for a muliplier
6
Example 1
The function y = -0.8x + 67.3 represents the estimated temperature of a cave in degrees Fahrenheit after x days. Which statements are correct about the linear model? Select all that apply
-the slope is -0.8
-the inital value is 67.3
7
Multiple Choice
The function y = -0.8x + 67.3 represents the estimated temperature of a cave in degrees Fahrenheit after x days. Which statements are correct about the linear model?
What is the initial value?
0.8
-0.8
67.3
x
8
Multiple Select
The function y = -0.8x + 67.3 represents the estimated temperature of a cave in degrees Fahrenheit after x days. Which statements are correct about the linear model? Select all that apply
The initial temperature of the cave is -0.8F
The initial temperature of the cave is 67.3F
The cave's temperature increases about 0.8F each day
The cave's temperature increases about 67.3F each day
The cave's temperature decreases about 0.8F each day
9
Multiple Choice
A science class collected data measuring the amount of water in a bucket that was out in the Sun. The equation w= -1.5h + 18 represents how much water, w , was in the bucket after hours, h. According to this equation, how many hours did take for the bucket to be emptied?
6
10
12
18
10
Multiple Choice
Oscar recently began receiving allowance from his parents. His balance can be represented by the linear model y = 8.25x + 37.81, where x is the number of weeks Oscar has been getting his allowance, and y is his total money balance.
What is the value of his weekly allowance?
8.25
37.81
11
Multiple Choice
Oscar recently began receiving allowance from his parents. His balance can be represented by the linear model y = 8.25x + 37.81, where x is the number of weeks Oscar has been getting his allowance, and y is his total money balance.
How much money did Oscar have before he started getting an allowance?
8.25
37.81
8.SP.3
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