The concept[ edit ] Clock with auxiliary dial displaying the equation of time. Piazza Dante, Naples During a year the equation of time varies as shown on the graph; its change from one year to the next is slight. Ignoring very slow changes in the Earth's orbit and rotation, these events are repeated at the same times every tropical year.

Find the slope and the y-intercept of the line. This example is written in function notation, but is still linear.

As shown above, you can still read off the slope and intercept from this way of writing it. We can get down to business and answer our question of what are the slope and y-intercept.

In this form, the slope is m, which is the number in front of x. In our problem, that would have to be 2.

In this form, the y-intercept is b, which is the constant. In our problem, that would be The answer is the slope is 2 and the y-intercept is Note how we do not have a y. This type of linear equation was shown in Tutorial If you said vertical, you are correct.

The graph would look like this: Note that all the x values on this graph are 5. 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. Looking at the graph, you can see that this graph never crosses the y-axis, therefore there is no y-intercept either. Another way to look at this is the x value has to be 0 when looking for the y-intercept and in this problem x is always 5.

So, for all our efforts on this problem, we find that the slope is undefined and the y-intercept does not exist.Algebra Help.

This section is a collection of lessons, calculators, and worksheets created to assist students and teachers of algebra. Here are a few of the ways you can learn here.

The notion of line or straight line was introduced by ancient mathematicians to represent straight objects (i.e., having no curvature) with negligible width and lausannecongress2018.com are an idealization of such objects. Until the 17th century, lines were defined in this manner: "The [straight or curved] line is the first species of quantity, which has only one dimension, namely length, without any width.

This is called the slope-intercept form because "m" is the slope and "b" gives the y-intercept.

- EES Features
- Example 1: Writing Equations Given Slope and a Point

(For a review of how this equation is used for graphing, look at slope and graphing.). I like slope-intercept form the best. The equation of time describes the discrepancy between two kinds of solar lausannecongress2018.com word equation is used in the medieval sense of "reconcile a difference".

The two times that differ are the apparent solar time, which directly tracks the diurnal motion of the Sun, and mean solar time, which tracks a theoretical mean Sun with noons 24 hours apart. Apparent solar time can be obtained by.

The equation of time describes the discrepancy between two kinds of solar lausannecongress2018.com word equation is used in the medieval sense of "reconcile a difference".

The two times that differ are the apparent solar time, which directly tracks the diurnal motion of the Sun, and mean solar time, which tracks a theoretical mean Sun with noons 24 hours apart. . The equation of a line is typically written as y=mx+b where m is the slope and b is the y-intercept.

If you know two points that a line passes through, this page will show you how to find the equation of the line.

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Find the Equation of a Line Given That You Know Two Points it Passes Through - WebMath