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The general equation of a straight line graph is y = mx + c, where m is the slope and c the intercept on the y axis.

So the slope is 2, and the y intercept is -3.

To plot, calculate y when x = -3:

y = 2x - 3

y = 2*(-3) - 3

y = -6 - 3

y = -9, so plot the point (-3, -9)

Now find y when x = 3:

y = 2*3 - 3

y = 6 - 3,

y = 3, so plot the point (3,3)

Join the two points you have plotted, and there is your graph.

Any point on this graph is a solution to your equation.

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Q: Can you solve the equation y equals 2x plus 3?
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