How would you prove that the graph of a linear equation is a straight line, and vice versa, at a "high school" level?
124662
Why do we believe the equation $ax+by+c=0$ represents a line?
4112
How to prove that a simple graph having 11 or more vertices or its complement is not planar?
27373
Graph Proof by induction.
105433
Graphing $y = \frac{x^2-4}{x-2}$
84987
Two paths that show that $\frac{x-y}{x^2 + y^2}$ has no limit when $(x,y) \rightarrow (0,0)$
119195
Proving two lines in vector form intersect algebraically
3833
How to find an equation of a line using Mathematica
35345
How do i prove invertibility of this linear transformation
76586
How to prove that linear transformations transforms lines into lines
68269
Regression Proof that the point of averages (x,y) lies on the estimated regression line
79040
Graph of $|x| + |y| = 1$
109483
Straight lines - product of slope of perpendicular lines.
90186
graphing $y=\lim\limits_{n \to \infty}{\sqrt[n]{1+x^n}}$
27366
Prove that $g$ is tangent to the graph of $f$
46515
Proof of proficiency in mathematics
45193
prove or supply counter example about graph
148169
prove that line bisect section