www.reference.com/article/create-line-graph-excel-5a702ddfd0c129b3

To create a line graph in Microsoft Excel 2013, use the mouse to highlight the data you want to include in the graph, and select the desired type of line graph from the Insert tab. Be sure to highlight the headings of rows and columns of the data table.

www.reference.com/article/equation-tangent-line-161c23e66e5048ac

To find the equation of a line that is tangent to a curve, you must find a line with the same slope as that point of the curve. This can be done with a graphing calculator that can give the slope at a particular point or by hand using the derivative of a curve function.

www.reference.com/article/equation-circle-facedae62f4f1090

Find the equation of a circle using the formula (x-h)squared+(y-k)squared=r squared. Know that h and k represent the coordinates for the center, with h being the x value, k being the y value and r being the radius.

www.reference.com/article/chemical-equation-water-7ee69a831e2df9d7

The chemical equation formula for water is expressed as H2O, but also is acceptable when displayed as HOH. In this equation, two hydrogen atoms react with an oxygen atom to form a single molecule of H2O.

www.reference.com/article/warm-near-equator-34428df52b44db52

It is warm near the equator because the sun is more directly overhead rather than at an angle like it is at the poles. The areas that are hit by the rays of the sun are greater at the equator than at higher latitudes.

www.reference.com/article/equation-density-8ad3383945609a81

Density is calculated by dividing mass by volume. As density measurements are commonly reported in grams per cubic centimeter, conversion is required when the mass or volume of a material is measured using other units.

www.reference.com/science/equation-apparent-weight-797ad7184fd2f675

The equation for measuring apparent weight is F = mg + ma. F represents apparent weight in newtons, m is the mass of the object, g is the acceleration due to gravity (9.8 meters per second squared on Earth's surface) and a is the acceleration of the object.

www.reference.com/article/mean-excel-4718c319f3d9a8cc

In Excel, the mean function is used to calculate the average of a set of numbers. The numbers used can come from any cell in an Excel spreadsheet by listing the cells involved into the average function box.

www.reference.com/article/inverse-equation-932dbb0f7e8261c2

An inverse equation, or inverse function, is an equation that reverses another equation. If an equation will give the value of y when providing x, the inverse equation will give the value of x when providing y.

www.reference.com/world-view/equation-tangent-line-curve-32d2a51de377ccac

Find the equation for the tangent line to a curve by finding the derivative of the equation for the curve, then using that equation to find the slope of the tangent line at a given point. Finding the equation for the tangent line requires a knowledge of calculus and the formula for the slope.