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Which coordinate plane shows the graph of 3x +y> 9?

User Gregers
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1 Answer

13 votes
13 votes

Explanation:

First we have to turn this from standard form to slope-intercept form.

We'll subtract 3x on both sides to get:


y > - 3x + 9

Now in order to graph this inequality, you must know that:

  • 9 is the y-intercept (the point where the line crosses the y-axis), and -3 is the slope because it goes down 3 units and to the right 1 unit.
  • The shaded area will be above the line since y is greater.
  • The line will be negative and have a negative slope.
  • The line will be dotted since the sign is greater-than, not greater-than-or-equal-to.

(The line will be graphed above for your convenience⤴⤴⤴)

Hope this helps :)

Which coordinate plane shows the graph of 3x +y> 9?-example-1
User Nikita Goncharov
by
2.7k points