- #1
caprija
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Could someone please explain how to graph y=x-2 and y=4-x
and find the coordinates of the point of intersection.
and find the coordinates of the point of intersection.
do I use y=mx+b?HallsofIvy said:y= x-2
If x= 0, what is y?
If x= 2, what is y?
can you plot those two (x,y) points?
Since the graph of y= x- 2 is a straight line just draw the line between those two points.
Now do exactly the same thing using y= 4- x
If x= 0, what is y?
If x= 2, what is y?
Plot those two (x,y) points and draw the line through them.
Where do those two line cross?
You said you were given y=x-2 and y=4-x. Why not use them?caprija said:do I use y=mx+b?
How would I find out what y equals?
Linear equations are mathematical expressions that involve two variables and can be represented by a straight line on a graph. They are commonly used to model real-world relationships and can be solved to find the values of the variables.
To solve a linear equation, you can use the basic algebraic principles of adding, subtracting, multiplying, and dividing to isolate the variable on one side of the equation. The goal is to end up with the variable equal to a specific number, which represents its value.
The slope-intercept form of a linear equation is y = mx + b, where m represents the slope of the line and b represents the y-intercept, or the point where the line crosses the y-axis. This form is useful for graphing and solving linear equations.
No, linear equations can only have two variables. This is because they are represented by a straight line on a graph, which only has two dimensions. If there are more than two variables, it is considered a system of linear equations.
Linear equations are commonly used in real life to model relationships between two variables, such as distance and time, cost and quantity, or temperature and time. They can also be used to make predictions and solve problems in fields such as economics, engineering, and physics.