The document defines the x-intercept and y-intercept of a graph. The x-intercept is the x-coordinate where the line or curve crosses the x-axis, when y is equal to 0. The y-intercept is the y-coordinate where the line or curve crosses the y-axis. It provides an example of how to find the y-intercept and x-intercept from the equation of a line, y=mx+b, by plugging in values for x and y and solving for b and x, respectively.

1. X and Y Intercepts Greg Windle Algebra 2C

2. What is the X-Intercept? The value of X when the line or curve of a graph intersects or crosses the x axis.

3. What is the Y-Intercept? The value of Y when the line or curve of a graph intersects or crosses the Y axis.

4. Common Uses You will most commonly find the Y intercept in Algebra. This is found in the formula for a linear line: y=mx+b However the X incept can also be found using that formula.

5. Y = mx + b Y = the y coordinate M = Slope X = the x coordinate B = Y-intercept In order to find the Y-intercept, you can simply plug in the slope and one set of coordinates, and solve for b. There is no variable representing the x-intercept, however the x intercept is the coordinate of x when y is equal to 0. So plug in 0 for y, and solve for x in order to find the X-intercept.

6. EF-4 (a) y = -2x + 7 The problem asks for you to graph this equation. One thing that all linear lines and equations have is a y-intercept, or b. In this case b=7 So the y intercept is 7. Plug in 0 for Y and solve for x.

7. The X-intercept of BB-4 (a) After you plug in 0 for y you should get this: 0 = -2x + 7. Subtract 7 from both sides: -7 = -2x Divide both sides by -2: 3.5 = x Therefore: When y is 0, x is 3.5 Making 3.5 the X-intercept.