6.5B Proportions

What is the formula for finding the unit rate?

• Multiply the quantity by the number of units.

• Add the quantity to the number of units.

• Divide the quantity by the number of units.

• Subtract the number of units from the quantity.

What is a proportion?

• A proportion is a type of fraction.

• A proportion is an equation that states that two ratios are equal.

• A proportion is a method of solving equations.

• A proportion is a statistical measure of variability.

What is the relationship between ratios and proportions?

• Ratios compare two quantities, while proportions show that two ratios are equal.

• Ratios are always larger than proportions.

• Proportions are a type of ratio that cannot be simplified.

• Ratios and proportions are unrelated concepts.

What is the cross-multiplication method?

• Cross-multiplication involves adding the numerators of two ratios.

• Cross-multiplication involves multiplying the numerator of one ratio by the denominator of the other ratio.

• Cross-multiplication involves dividing the denominators of two ratios.

• Cross-multiplication involves subtracting the numerators of two ratios.

How do you solve a proportion?

• Add the terms together and divide by two.

• Cross-multiply the terms and then solve for the unknown variable.

• Subtract the smaller term from the larger term.

• Multiply both sides by the same number.

If Jack jumps 40 times in 4 minutes, how many times does he jump in 1 minute?

• 8 jumps/minute

• 10 jumps/minute

• 12 jumps/minute

• 15 jumps/minute

How do you set up a proportion for scaling recipes?

• Set up a proportion using the original recipe quantities and the desired quantity to find the new amounts.

• Use random numbers to adjust the recipe quantities.

• Only double the original quantities for scaling.

• Ignore the original quantities and just use the desired amount.

If 13 out of 20 homes have a personal computer, how do you find the expected number of homes with a computer on a street with 60 homes?

• Set up the proportion: 13/20 = x/60, then cross-multiply and solve for x.

• Calculate the average number of computers per home and multiply by 60.

• Use the formula: (13/20) * 60 = x, where x is the expected number of homes.

• Estimate based on the percentage of homes with computers in the neighborhood.

Ingrid types 3 pages in the same time Tanya types 4.5 pages. How do you find how many pages Tanya types when Ingrid types 11 pages?

• Set up the proportion: 3/4.5 = 11/x, then cross-multiply and solve for x.

• Calculate the ratio of pages typed by Tanya to Ingrid and multiply by 11.

• Use the formula: pages typed = (Ingrid's pages / Tanya's pages) * 11.

• Determine the average pages typed per hour and apply it to 11 pages.

How do you find the missing value in a proportion?

• By adding the two known values together.

• By cross-multiplying and then dividing.

• By taking the average of the known values.

• By subtracting the known value from the total.