Graph the equation by plotting points.
-y = 2x + 4

Question

Quizplus · Accepted Answer

To plot points on the graph, choose different values for x and substitute those values in the equation to find the corresponding value of y. 
For example, when x = 0, y = 2(0) + 4 = 4. So the point (0,4) lies on the graph. 
Similarly, x = 1 gives y = 2(1) + 4 = 6. So the point (1,6) lies on the graph. 
By plotting more such points and joining them, we get a straight line passing through all these points. 
When you connect all the points, you get line A in the graph choices. To plot points, we need to choose arbitrary values of x and substitute them in the equation to find the corresponding values of y.

Let's choose some values of x: 
When x=0, y = 2(0) + 4 = 4 
When x=1, y = 2(1) + 4 = 6 
When x=2, y = 2(2) + 4 = 8 
When x=3, y = 2(3) + 4 = 10

Now we can plot these points on a graph: 
(0,4), (1,6), (2,8), (3,10)

When we connect these points with a straight line, we get a graph that looks like the one in option A. Therefore, the best choice is A.

Graph the Equation by Plotting Points