Question

If the equation y=3x−1 y = 3 x − 1 were graphed on the xy-coordinate plane, which of the following would not be a point on that graph?

Answer 1

See Explanation

Explanation:

This question requires options.

Since, there are none, I'll answer on a general term.

For a coordinate point to be on the graph, the x and y value when substituted in the given equation must make the equation true.

Take for instance

(x,y) = (1,2)

This implies that

x = 1

y = 2

Substitute values of x and y in

y = 3x - 1

We have:

2 = 3 * 1 - 1

2 = 3 - 1

2 = 2

Notice that both sides of the equation are equal.

Hence

(1,2) lies on the xy coordinate plane.

However,

Take for instance (x,y) = (2,4)

This means

x = 2 and y = 4

Substitute values of x and y in

y = 3x - 1

4 = 3 * 2 - 1

4 = 6 - 1

4 ≠ 5

The above does not represent an equation because 4 is not equal to 5.

Hence, (2,4) does not lie on the coordinate plane

So, to answer your question, you need to substitute values of x and y in the given equation.

Which ever of the options that does not show equality answers your question.