Constants are useful for defining values that are used many times within a function or program. By using constants, programmers can modify multiple instances of a value at one time. For example, changing the value assigned to max in the example above will modify the value wherever max is referenced.

Since these constants are rooted in physical properties, it is generally thought they cannot change over space and time. Every electron, for example, has the same charge.

more A fixed value. In Algebra, a constant is a number on its own, or sometimes a letter such as a, b or c to stand for a fixed number. Example: in “x + 5 = 9”, 5 and 9 are constants.

There are 4 types of constants in C.

• Integer constants.
• Character constants.
• Real/Floating point constants.
• String constants.

The minus sign is actually ‘attached’ to the constant in a way. Therefore, any time you see a minus to the left of a constant, it belongs to that constant. Again, a minus or negative sign is to the left of the 3, so we get a -3 constant. There is also one just to the left of the 4, so we get a -4 constant.

A negative slope means that two variables are negatively related; that is, when x increases, y decreases, and when x decreases, y increases. Graphically, a negative slope means that as the line on the line graph moves from left to right, the line falls.

The negative intercept tells you where the linear model predicts revenue (y) would be when subs (x) is 0. Your question appears to be prompted by confusion about the fact that in your fitted model, E(Y|x=0)≠0, even though logically, you would expect no revenue then.

A positive y-intercept means the line crosses the y-axis above the origin, while a negative y-intercept means that the line crosses below the origin. Simply by changing the values of m and b, we can define any straight line.

Depending on your dependent/outcome variable, a negative value for your constant/intercept should not be a cause for concern. This simply means that the expected value on your dependent variable will be less than 0 when all independent/predictor variables are set to 0.

It’s called the “y intercept” and it’s the y value of the point where the line intersects the y- axis. For this line, the y-intercept is “negative 1.” You can find the y-intercept by looking at the graph and seeing which point crosses the y axis. This point will always have an x coordinate of zero.

Slopes come in 4 different types: negative, positive, zero, and undefined. as x increases.

A horizontal line has slope zero since it does not rise vertically (i.e. y1 − y2 = 0), while a vertical line has undefined slope since it does not run horizontally (i.e. x1 − x2 = 0).

Zero Slope and Graphing Just like in the bicycling example, a horizontal line goes with zero slope. One thing to be aware of when you graph, however, is that this horizontal line can be any height. For example, the picture you see here has three horizontal lines. In each case the slope is zero.

A zero slope line is a straight, perfectly flat line running along the horizontal axis of a Cartesian plane. The equation for a zero slope line is one where the X value may vary but the Y value will always be constant. An equation for a zero slope line will be y = b, where the line’s slope is 0 (m = 0).

04=0 is defined. 40 is not.

A slope of zero means that there is a constant relationship between x and y. Graphically, the line is flat; the rise over run is zero.

1% as a decimal is 0.01 and hence the slope is 0.01. That means for a run of pipe of a certain length the rise must be 0.01 times the length. Thus for you example, since the length of the run is 80 feet which is 80 × 12 = 960 inches the rise must be 0.01 × 960 = 9.6 inches.

In other words, the slopes of parallel lines are equal. Note that two lines are parallel if their slopes are equal and they have different y-intercepts. In other words, perpendicular slopes are negative reciprocals of each other. Here is a quick review of the slope/intercept form of a line.

The slope of a line is change in Y / change in X. The slope of a horizontal line = 0, not undefined. The slope of a vertical line = undefined.

2 Answers By Expert Tutors The vertical line that goes through the point (5,2) has equation x = 5.

Yes, a linear function can have a slope of zero. In fact, all horizontal lines, or lines with the function y = b, where b is any constant, have a…

You can type a straight vertical line, or “|,” on most modern keyboards dating back to some of the 1980s IBM PCs. It’s generally found above the backslash, so you can type a “|” by holding down the shift key and hitting the “” key.

Well you know that having a 0 in the denominator is a big no, no. This means the slope is undefined. As shown above, whenever you have a vertical line your slope is undefined.

A zero slope is just the slope of a horizontal line! The y-coordinate never changes no matter what the x-coordinate is! In this tutorial, learn about the meaning of zero slope.

A way to remember this is to think about the numbers are on the x-axis. Going to the right of the origin are the positive values, and going to the left of the origin are the negative values. If the slope is positive, then the rise and the run need to either be BOTH positive or BOTH negative.