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How do you find points to plot y = 5x + 2?

To graph the linear equation y=5x+2y = 5x + 2, start by selecting several values for xx and calculating the corresponding yy values.

To begin plotting the equation, choose simple integer values for xx. A good starting set includes 2,1,0,1,-2, -1, 0, 1, and 22. For each selected xx value, substitute it into the equation to determine the corresponding yy value.

Let’s illustrate this with a few examples:

  1. For x=0x = 0:

    y=5(0)+2=2y = 5(0) + 2 = 2

    This gives us the point (0,2)(0, 2).

  2. For x=1x = 1:

    y=5(1)+2=7y = 5(1) + 2 = 7

    This results in the point (1,7)(1, 7).

  3. For x=1x = -1:

    y=5(1)+2=3y = 5(-1) + 2 = -3

    This yields the point (1,3)(-1, -3).

After calculating these values, you will have the following set of coordinates: (0,2)(0, 2), (1,7)(1, 7), and (1,3)(-1, -3). You can now plot these points on a graph with the xx-axis and yy-axis. Once you’ve plotted at least two points, you can draw a straight line through them, as the equation y=5x+2y = 5x + 2 describes a linear relationship.

Keep in mind that plotting more points can enhance the accuracy of your line. However, for linear equations, two points are sufficient to define the line. This method effectively helps you visualize the relationship between xx and yy as described by the equation.

Answered by: Prof. Michael Lewis
IB Physics Tutor
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Our families consistently gain offers from at least one of their target schools, including Eton, Harrow, Wellington and Wycombe Abbey.

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