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If (m<0) and (c>0) in (y=mx+c), how will the line behave?

Answer and explanation

Correct answer: Decreasing and cuts positive part of (y)-axis

In the equation y=mx+c, m is the slope and c is the y-intercept. A negative slope means that as x increases, y decreases, so the line falls from left to right. A positive c means that when x=0, y=c is above zero. Therefore the line crosses the y-axis at a positive point while having a decreasing direction.

Here m<0 gives a decreasing line, and c>0 gives a positive y-intercept. These two facts together match option B: decreasing and cutting the positive part of the y-axis. The line is not horizontal because its slope is not zero, and it does not necessarily pass through the origin because c is positive rather than zero.

Related tags

Negative SlopePositive InterceptGraph Behavior

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