An equation is formed by all the points in the plane that make it true

The answer is graph.

Step-by-step explanation:

The graph of linear equation is a set of all the points in its coordinate plane, that are solutions to the equation or make equation true.

An equation that two variables and whose graph is a line is a linear equation.

While graphing we need two axis , the x axis and the y axis.

step-by-step explanation:

answer: option a.

step-by-step explanation:

you know that the quadrilateral opqr ( a four sided figure) is inscribed in circle. this means that all its vertices are on the circle.

then, by definition, the opposite angles of the quadrilateral are supplementary, this means that the sum of their measures is 180 degrees.

you can observe in the figure that the angles ∠opq   and the angle ∠orq   are opposite, therefore:

then, can be used to d to calculate the measure of ∠opq