Can anyone teach me what is a graph and how it works?thank you..

1 Answer
Feb 11, 2016

Answer:

Sample plot of line #y=x-4#
Notice Slope #m=1,# For #theta=45^@#, #c=-4# is the #y#- intercept.

Explanation:

First step: Express the given equations in the slope-intercept form.
#y=mx+c#
Here #m# is the slope and #c# is the #y#- intercept.

Slope of a line is #tan theta#, where #theta# is the angle the line makes with the #x#-axis.

The intercept is the point where the line intersects the #y#-axis

Second step: Plot both the lines on a graph paper.

Third step: Locate the point of intersection of both lines. Note down point #(x,y)#, the point of intersection. This is the solution for set of linear equations.

To learn how to plot straight line on a graph, one can make use of Graph tool given at the top of Answer box.

graph{y=x-4 [-10.14, 10.13, -5.07, 5.07]}