Algebra 1 Unit 4 Practice 2 for Test

Front

What is the formula to calculate the slope of a line given two points (x1, y1) and (x2, y2)?

Back

The slope (m) is calculated using the formula: m = (y2 - y1) / (x2 - x1).

Front

What is the equation of a horizontal line that passes through the point (a, b)?

Back

The equation of a horizontal line is y = b.

Front

What is a function in mathematical terms?

Back

A function is a relation where each input has exactly one output.

Front

What does it mean if a graph is 'not a function'?

Back

A graph is not a function if any vertical line intersects it at more than one point.

Front

What is the slope of a line that is increasing?

Back

The slope of an increasing line is positive.

Front

What is the slope of a line that is decreasing?

Back

The slope of a decreasing line is negative.

Front

What is the slope of a horizontal line?

Back

The slope of a horizontal line is zero.

Front

What is the slope of a vertical line?

Back

The slope of a vertical line is undefined.

Front

If f(5) = 12, what does this mean in terms of function notation?

Back

It means that when the input is 5, the output of the function f is 12.

Front

How do you determine if a relation is a function using the vertical line test?

Back

If any vertical line crosses the graph more than once, the relation is not a function.