Solve for x: 4 − (x + 2) −7 x −9
2 answers:
You might be interested in
18. A line perpendicular to the x-axis is a vertical line.
The equation of a vertical line is
x = k,
where k is the x-coordinate of every point on the line.
Since this vertical line goes through point (-10, 0.5), and this point has x-coordinate -10, then every point on the line has x-coordinate -10.
The equation is
x = -10
19.
To find f(9), just replace x with 9 and evaluate the expression.
20.
The equation of a vertical line is
x = k,
where k is the x-coordinate of every point on the line.
Since this vertical line goes through point (-10, 0.5), and this point has x-coordinate -10, then every point on the line has x-coordinate -10.
The equation is
x = -10
19.
To find f(9), just replace x with 9 and evaluate the expression.
20.
Answer:
No, the graph does not represent a function because it does not pass the vertical line test.
<h2>What is a function?</h2>A function is when each x-value only has one y-value. We know that a graph represents a function if it passes the vertical line test.
<h3>Vertical Line Test</h3>To pass the test, any vertical line that we draw on the graph should only touch one point.
A vertical line is a straight line that goes from top to bottom.
- Draw vertical lines through points on the graph, like in the photo below.
- Check if any vertical lines touch more than one point.
The yellow vertical line touches two points, which is more than one. So, the graph does not pass the test. This graph is does not represent a function.
