Determine the constant of proportionality in the following equation:
y = 8x
Proportional Relationships
Quiz
•
Mathematics
•
7th Grade
•
Medium
Jamie Doby
Used 34+ times
FREE Resource
7 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Determine the constant of proportionality in the following equation:
y = 8x
8
18
8x
Answer explanation
k is being multiplied by x. Since 8 is the coefficient in the equation, 8 is the constant of proportionality, or k.
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Determine k using the table.
k = 35
k = 30
k = 3.5
Answer explanation
Take an ordered pair from the table and plug each coordinate (x and y) into the formula for k.
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Which of the following equations best represents this table?
35 = 1x
y = 35x
y = 3.5x
Answer explanation
Take an ordered pair from the table and plug each coordinate (x and y) into the formula for k.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A restaurant has an all-you-can-eat buffet for $13.95 per person. What is the rate of proportionality?
$139.50
$13.95
It depends on how many people are at the table
Answer explanation
What are they charging per person? If they have 2 people, they would charge them 2 times that number. Etc, etc.
5.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Use the table to determine the constant of proportionality, k.
380
188
95
Answer explanation
Determine k by dividing each y by the corresponding x.
6.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Which equation best represents the graph?
y = 50x
y = 75x
x = 75y
y =25
Answer explanation
Find 2 points on the graph that cross at exact points. Take each ordered pair's y and divide it by the ordered pair's x. This is your k.
The formula for the equation is y = kx. You plug in the number you found to represent k FOR k in the equation y = kx.
The points seen are (2 , 150) and (4 , 300).
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Which equation best represents this graph?
y = 50x
x = 25y
y = 25x
x = 50y
Answer explanation
Find a point on the graphed line. Divide y by x to find k. Plug k into the formula y = kx.
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