Unit 7 Review

Front

What do the variables x and y represent in the context of withdrawing money from a bank account?

Back

x = number of weeks, y = account balance.

Front

What is the equation that describes the relationship between the number of weeks and the account balance when withdrawing $10 per week from $1200?

Back

y = -10x + 1200.

Front

How do you calculate the average rate of change of a function between two points?

Back

Average rate of change = (f(b) - f(a)) / (b - a).

Front

What is the vertex form of a quadratic equation?

Back

The vertex form is given by y = a(x-h)^2 + k, where (h,k) is the vertex.

Front

What do the variables x and y represent in the context of buying a TV with a down payment and weekly payments?

Back

x = number of weeks, y = total cost of the TV.

Front

What is the slope-intercept form of a linear equation?

Back

The slope-intercept form is y = mx + b, where m is the slope and b is the y-intercept.

Front

What does the slope of a line represent in a real-world context?

Back

The slope represents the rate of change of one variable with respect to another.

Front

How do you find the y-intercept of a linear equation?

Back

Set x = 0 in the equation and solve for y.

Front

What is the significance of the x-intercept in a graph?

Back

The x-intercept is the point where the graph crosses the x-axis, indicating where y = 0.

Front

What is a quadratic function?

Back

A quadratic function is a polynomial function of degree 2, typically in the form y = ax^2 + bx + c.