Video Transcript
Which of the following graphs represents the equation two 𝑥 minus three 𝑦 equals 18?
Two 𝑥 minus three 𝑦 equals 18 can be rewritten as three 𝑦 equals two 𝑥 minus 18. Dividing both sides of this equation by three gives us 𝑦 is equal to two-thirds 𝑥 minus six. This means that the slope or gradient of the equation two 𝑥 minus three 𝑦 equals 18 is two-thirds. And its 𝑦-intercept is negative six.
The only graph that has an intercept of negative six is graph A. The intercept of graph B is negative two. Graph C has an intercept of six. Graph D also has an intercept of six. And graph E has an intercept of negative nine.
Graph A also has a slope or gradient of two-thirds. This is the same as the slope of two 𝑥 minus three 𝑦 equals 18. Therefore, graph A represents the equation two 𝑥 minus three 𝑦 equals 18, which could also be written 𝑦 equals two-thirds 𝑥 minus six.
