Algebra 1 Practice Checkpoint 1

Front

Back

The equation represents the total cost, y, in dollars, for using a taxi service to travel a distance of x miles.

Front

What is a function in mathematics?

Back

A function is a relation where each input (x-value) has exactly one output (y-value).

Front

Which ordered pair should be removed from the set \{(-8,6),(4,6),(-5,-1),(-1,-4),(-1,7),(1,-1)\} to make it a function?

Back

Remove the ordered pair (-1,-4) because it shares the same x-value (-1) with another pair.

Front

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

Back

The y-intercept is the value of y when x is 0, representing the starting point of the function on the y-axis.

Front

If an artist spends $7.50 on each paintbrush and $11.25 on each canvas, how can we express the total cost equation?

Back

Front

What does a correlation coefficient of 1 indicate about a scatter plot?

Back

A correlation coefficient of 1 indicates a perfect positive linear relationship between the two variables.

Front

Back

The slope of -1.50 indicates that for each ticket purchased, the amount of money decreases by $1.50.

Front

How do you determine if a relation is a function from a set of ordered pairs?

Back

Check if any x-value is repeated; if it is, the relation is not a function.

Front

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

Back

Front

What does the term 'ordered pair' mean in mathematics?

Back

An ordered pair is a pair of numbers (x, y) that represent a point in a coordinate system.