Proportions and Proportional Relationships Flashcards
Is the relationship in the table proportional? Why or Why Not?
Yes, the relationship is proportional. There are always 15 kids to every 1 adult.
Is the relationship in the table proportional? Why or Why Not?
No, the relationship in the table is not proportional. The number of tickets is not always the same cost. The tickets get cheaper as you purchase more.
Is the relationship in the table proportional? Why or Why Not?
Yes, the relationship in the table is proportional. The value of “y” is always one more than the value of “x”.
Is the relationship in the table proportional? Why or Why Not?
No, the relationship in the table is not proportional. The way the “x” value changes to “y” does not stay the same.
Write and solve an equation to identify the missing value.
5x = 37.5
x = 7.5
Write and solve an equation to identify the missing value.
13.5x = 108
x = 8
Write and solve an equation to identify the missing value.
24x = 48
x = 2
Write and solve an equation to identify the missing value.
20x = 140
x = 7
Write and solve an equation to identify the missing value.
25x = 36
x = 1.44
Write and solve an equation to identify the missing value.
6x = 24
x = 4
What are the two steps you take in order to solve for a missing value within a proportion.
- Cross Multiply
- Divide
Solve.
x = 4
Solve.
x = 10
Solve.
x = 13
Is the relationship proportional? Explain why or why not?
Yes, the relationship is proportional. Each pound of strawberries is $1.50.
Is the relationship proportional? Explain why or why not?
No, the number of students does not change with time.
Is the relationship proportional? Explain why or why not.
No, the relationship is not proportional. Charlie’s height does not change at a constant rate.
Is the relationship proportional? Explain why or why not?
No, the relationship is not proportional. Her time per changes changes from the first 5 miles to the next 3 miles.
Solve.
32 miles
Solve.
$540.00
Solve.
$28.40
How do you subtract integers?
KCC (Keep the first number, change the subtraction to a plus, change the second number to it’s opposite) & follow addition rules.
How do you add integers with the same sign?
Add the two numbers together and keep the sign.
How do you add integers with different signs?
Subtract the two numbers and steal the sign from the number with the larger absolute value.
Define: variable
A variable is a letter that represents an unknown number.
Define: coefficient
A coefficient is a value that is multiplied by a variable. (It is the number attached to the variable.)
Define: absolute value
The absolute value of a number is the number of jumps (or places) the number is from zero on a number line.
Define: constant
A constant is a number that does not change. It is by itself (does not contain a variable) within an expression and/or equation.
Define: proportion
A proportion is two ratios which are set equal to each other. Proportions are written in fraction form.
Define: ratio
A ratio is the comparison of two quantities.
