Graphs
What is the constant of proportionality, k, in the table:
x: 1 2 3 4
y: 5 10 15 20
5
y/x = 5/8 If y is 10 than what is x?
4
Jack counts 20 red cars, y, for every 4 blue cars, x. What is k?
5
Draw a graph with a constant of proportionality of 1/2.
Must go through the points (0,0); (2,1); (4,2); etc.
What is the constant of proportionality, k, in the table:
x: 3 6 9 12
y: 4 8 12 16
4/3 or 1.333
y = __ __
y=kx
y = 11x If y is 121, what is x?
11
Noah cooks 5 hamburgers, y, for every 3 hotdogs, x. What is k?
5/3
A straight line is always proportional. TRUE or FALSE (need explanation for full points)
FALSE if it doesn't go through the origin.
What is the missing value of the table?
1 3 5 7
0.25 0.75 ? 1.75
1.25
What is the term for the point (0,0) on a graph?
origin
x/y = 22/33 If y = 3 then what is x?
x = 2
The boys in a class compared to the girls are in a ratio of 4 to 7 If there are 16 boys how many girls are there?
28
Find the y-intercept on this nonproportional table
x: -5 0 5 10
y: -12 -10 -8 -6
-10
What is the point called where the line crosses the y-axis?
y-intercept
If y/x = 18/5 and y = 2 what is x
5/9
School days to weekend days come in a ratio of 5 to 2. If a you have 14 weekend days, How many school days do you have to go to?
35
Draw a graph that has a y-intercept of 3 and a slope of 3.
Goes through points (0,3); (1,6); (2,9)
Draw a table that has a k value of 7/5 and has at least 4 rows/columns
0,0 5,7 10,14 15,21 20,28
The ratio of people to square miles in Alaska is 5 to 1. How many people would live on 250 square miles?
1250 people