The Graph of a Line
We have the equation of the line:
y = 7x - 6
To plot a line, we only need two points. Then we make the line pass through both points and extend it up and down until desired.
We can select any point for x. For example, x = -1
Now we calculate the corresponding value of y according to the equation:
y = 7*(-1) -6
y = -7 - 6 = -13
Thus, we plot the point (-1,-13).
Now select another point, like x=2
Again, calculate the value of y:
y = 7*2 - 6
y = 14 - 6 = 8
Thus, the second point is (2,8)
We could use more points if we wanted, the line must pass through all of them.