Question

Explain how to graph y > 2x + 3

Answer 1

>; < - dot line

≥; ≤ - solid line

>; ≥ - shading above the line

<; ≤ - shading below the line

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y = 2x + 3 - it's a linear function. We only need two points to plot the graph. Select two any x values and calculate the y values:

for x = 0 → y = 2(0) + 3 = 0 + 3 = 3 → (0, 3)

for x = -2 → y = 2(-2) + 3 = -4 + 3 = -1 → (-2, -1)

y > 2x + 3

Dot line an shading above the line (look at the picture).