Math 8: Unit 3 Review

Front

What is the cost of mini bags of Skittles and soft pretzels?

Back

Mini bags of Skittles are $0.50 each and soft pretzels are $3 each.

Front

If you spent $12 on 2 pretzels and some mini Skittles, how do you calculate the number of Skittles bought?

Back

First, calculate the cost of 2 pretzels: 2 * $3 = $6. Then, subtract this from $12: $12 - $6 = $6. Since each mini bag of Skittles costs $0.50, divide $6 by $0.50 to find the number of bags: $6 / $0.50 = 12 bags.

Front

What equation represents the total spending on Tech-decks and Takis?

Back

The equation is 7x + 4y = 28, where x is the number of Tech-decks and y is the number of Takis.

Front

How do you determine who starts with more money from a graph?

Back

You look at the starting point of each line on the graph. The line that starts higher indicates the person with more money.

Front

What does a steeper line on a graph indicate?

Back

A steeper line indicates a faster rate of change. In the context of bank accounts, it shows a quicker increase or decrease in money.

Front

How can you check if a point lies on the graph of an equation?

Back

Substitute the x and y values of the point into the equation. If the equation holds true, the point lies on the graph.

Front

What is the significance of the y-intercept in a linear equation?

Back

The y-intercept is the point where the line crosses the y-axis, representing the value of y when x is 0.

Front

What does it mean if a graph shows a constant slope?

Back

A constant slope indicates a steady rate of change over time, meaning the relationship between the variables is linear.

Front

How do you interpret the solution to a system of equations graphically?

Back

The solution is the point where the graphs of the equations intersect, representing the values of the variables that satisfy both equations.

Front

What is the formula for calculating the total cost of multiple items?

Back

Total Cost = (Cost of Item 1 * Quantity of Item 1) + (Cost of Item 2 * Quantity of Item 2) + ...