Chapter 2 Linear Equations and Functions - 2.6 Draw Scatter Plots and Best-Fitting Lines - 2.6 Exercises - Quiz for Lessons 2.4-2.6 - Page 120: 7

$y=2x$

Start with a direct variation equation: $y=ax$ Plug in given values: $2=a.1$ $a=2$ Hence, the completed equation is: $y=2x$ The y-intercept is $0$. Plot a point $(0,0)$. The slope is $2$. Plot another point $(1,2)$. Draw the graph.