One of the lines at right matches the equation y = 2x + 3, and the other matches y = 2x − 2. Which line matches which equation?
Yoshi wants to add the line y = 2x + 1 to her graph. Predict where it would lie and sketch a graph to show its position. Justify your prediction.
Where would the line y = −2x + 1 lie? Again, justify your prediction and add the graph of this line to your graph.
Look at the y-intercepts, otherwise known as the b in
y = mx + b, to decide which line goes with which equation.
line a: y = 2x − 2, line b: y = 2x + 3
The slope of the line in part (c) is the opposite of the slope of the line in part (b). The y-intercepts are the same.
Use the eTool below to graph the line by completing the table.
Click the link at right for the full version of the eTool: CC3 7-65 HW eTool