H.I.T Math Pre- Test

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What is a proportional relationship?

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A proportional relationship is a relationship between two quantities where the ratio of one quantity to the other is constant. This is often represented by a straight line that passes through the origin on a graph.

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What does it mean if a graph passes through the origin?

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If a graph passes through the origin, it indicates that when one quantity is zero, the other quantity is also zero, which is a characteristic of proportional relationships.

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How do you find 30% of a number?

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To find 30% of a number, multiply the number by 0.30 (or 30/100). For example, to find 30% of 150, calculate 150 * 0.30 = 45.

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What is the formula to find the total number from a percentage?

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The formula to find the total number from a percentage is: Total = Part / (Percentage/100). For example, if 30% of a number is 45, the total number is 45 / 0.30 = 150.

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What does a ratio represent?

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A ratio represents a relationship between two quantities, showing how many times one value contains or is contained within the other.

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If the ratio of cats to dogs is 3:4, how do you find the number of cats if you know the number of dogs?

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To find the number of cats, use the ratio to set up a proportion. If there are 20 dogs, then (cats/dogs) = (3/4). Therefore, cats = (3/4) * 20 = 15.

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What is the distributive property in mathematics?

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The distributive property states that a(b + c) = ab + ac. It allows you to multiply a single term by two or more terms inside a set of parentheses.

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What is a straight line graph?

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A straight line graph represents a linear relationship between two variables, where the change in one variable is constant with respect to the change in the other.