NC Math 1 EOC Practice: Calculator Inactive

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What is an inequality?

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An inequality is a mathematical statement that compares two expressions and shows that one is greater than, less than, greater than or equal to, or less than or equal to the other.

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How do you graph an inequality in two variables?

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To graph an inequality in two variables, first graph the corresponding equation as a line. Then, shade the region that satisfies the inequality. Use a dashed line for < or > and a solid line for ≤ or ≥.

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What does the vertex of a parabola represent in a quadratic function?

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The vertex of a parabola represents the maximum or minimum point of the quadratic function, depending on the direction the parabola opens.

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How do you find the minimum value of a quadratic function in standard form?

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What is a system of equations?

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A system of equations is a set of two or more equations with the same variables. The solution is the set of values that satisfy all equations in the system.

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How do you solve a system of equations using substitution?

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To solve a system of equations using substitution, solve one equation for one variable, then substitute that expression into the other equation to find the value of the second variable.

Front

What is the formula for the cost function in a subscription model?

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Front

How do you calculate the total cost of a subscription over a period of time?

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To calculate the total cost of a subscription over a period of time, use the cost function and substitute the number of years into the equation.

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

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The y-intercept is the point where the line crosses the y-axis, representing the value of the dependent variable when the independent variable is zero.

Front

What does it mean for a function to be quadratic?

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