How can I graph y=2x−1 by plotting points?

Question

Edward Patten · Accepted Answer

To find the y-intercept, put x=0    y=2(0)−1    y=−1    To find the x-intercept, put y=0    2x−1=0    2x=1    x=12    Draw a system of axis. Mark these points on the graph.    Now draw a line through these two ponts.    To draw the graph by used points,    let x=−1, then y=2(−1)−1=−2−1=−3    Thus, first point is (−1;−3)    Let x=0, y=2(0)−1=−1    And second point is (0;−1)    Let x=1, y=2(1)−1=1    Third point is (1;1)    Here you go.

Archie Jones · Accepted Answer

When the exponents of the variables are all 1,the equation is a line.Thus, it is enough to find two points to draw it.
We can calculate two points assigning a number to x and calculating the corresponding number for y.
For example, when

x = 0

,

y = 2 \times 0 - 1 = - 1

. And the line will pass through the point

(0, - 1)

.
Now, we need a second point, we can take

x = 1

, foe example, then

y = 2 \times 1 - 1 = 1

. This line passes through

(1, 1)

. Finally, we can mark the two points on the plane and draw the line passing from these points.

karton · Accepted Answer

Plot the three points and draw a line through them. Add arrows to your line.

How can I graph y=2x−1 by plotting points?

Answered question

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