Ms. Garcia Math
	Ratio	Show/Hide
	A comparison of two things. It has 3 forms: 2 to 3 2/3 2:3	a ratio of two boys to three girls 2 to 3, 2/3, 2:3
	Equivalent Ratios	Show/Hide
	If two ratios have the same value when simplified, then they are called Equivalent Ratios.	2/3 = 4/6
	Rate	Show/Hide
	A ratio that compares quantities of different units, such as miles per hour, price per pound, students per class.	10 words in 5 seconds, 220 Km in 2 hours
	Unit Rate	Show/Hide
	Rate with a denominator of one. If Ana earns $80 in 8 hours, then unit rate of her earning is given as $80/8h = $10/h	20 miles per gallon, 60 miles/hour
	Proportion	Show/Hide
	A statement of equality between two ratios. Four quantities, a, b, c, d, are said to be in proportion if a/b = c/d or a:b = c:d	2/3 = X/30 X= (2 x 30)/3 = 20
	Proportional	Show/Hide
	Two variable quantities are proportional if one of them is always the product of the other and a constant quantity, called the coefficient of proportionality	The circumference of a circle is proportional to its diameter, with the constant of proportionality equal to p
	Proportional Relationship	Show/Hide
	Two variable quantities are proportional if one of them is always the product of the other and a constant quantity , called the coefficient of proportionality (Y = k X).	Apples are sold in a bag of 10 for $5. The ratio of dollars to Apples is 5:10 dollars = apples/2
	Directly Proportional	Show/Hide
	When two quantities both change by the same factor, they are in direct proportion.	Twice the apples costs twice the money
	Inversely Proportional	Show/Hide
	When one variable increases the other decreases in proportion so that the product is unchanged	the time taken for a journey is inversely proportional to the speed of travel Time = distance/velocity
	Cross Product.	Show/Hide
	The product of the numerator of one fraction and the denominator of the other fraction. When two ratios are equal, then the cross products of the ratios are equal.