The Equation y = mx + c (Leaving Cert Mathematics): Quizzes

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The Equation y = mx + c
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What is the form y=mx+cy = mx + c called?

Slope-intercept form

In the equation y=mx+cy = mx + c, what does mm represent?

The slope of the line

In the equation y=mx+cy = mx + c, what does cc represent?

The y-intercept

At what coordinates does the y-intercept occur?

(0,c)(0, c)

When does the y-intercept occur?

When x=0x = 0

What does a positive slope indicate?

The line is increasing

What makes a line appear steeper?

Larger absolute value of slope

What is true about parallel lines?

Identical slopes, different intercepts

What is the product of slopes of perpendicular lines?

−1-1

If a line has slope 23\frac{2}{3}, what is the perpendicular slope?

−32-\frac{3}{2}

What is the slope of 3x−2y−9=03x - 2y - 9 = 0 in slope-intercept form?

32\frac{3}{2}

What must you be careful with when rearranging equations?

Positive and negative signs

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