At about the 0:37 mark, the teacher says the value on my y-intercept is gonna be 0; he should have said y-axis instead of y-intercept.
At about the 2:02 mark, the teacher writes y=-11.5; he should have written y=-10.5. Because of this, he draws the line incorrectly. The line should go through the point (0,-10.5) instead of (0,-11.5).
In this lesson, students learn how to graph a line using x and y intercepts. The x intercept is where the line crosses the x-axis, while the y intercept is where the line crosses the y-axis. To find the intercepts, students need to plug in either zero for x or y and solve the equation. Once they have found both intercepts, they can connect the two points to graph the line.
Finding the x and y intercept and then graph
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