Equation of a Line (Leaving Cert Mathematics): Quizzes

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Equation of a Line
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12 questions from this quiz

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In slope-intercept form y=mx+cy = mx + c, what does mm represent?

The slope of the line

In slope-intercept form y=mx+cy = mx + c, what does cc represent?

The y-intercept

What is the equation of a vertical line?

x=kx = k

What is the equation of a horizontal line?

y=ky = k

What is the general form of a line equation?

ax+by+c=0ax + by + c = 0

What is the slope formula for points (x1,y1)(x_1, y_1) and (x2,y2)(x_2, y_2)?

m=y2−y1x2−x1m = \frac{y_2 - y_1}{x_2 - x_1}

In point-slope form y−y1=m(x−x1)y - y_1 = m(x - x_1), what is (x1,y1)(x_1, y_1)?

A known point on the line

What is the equation of a line with slope 33 and y-intercept −2-2?

y=3x−2y = 3x - 2

What is the slope of a line through (1,2)(1, 2) and (4,5)(4, 5)?

11

What is the equation of the line through (1,2)(1, 2) and (4,5)(4, 5)?

y=x+1y = x + 1

To find a line's equation, what do you need at minimum?

Slope & y-intercept OR two points

Which form is y=mx+cy = mx + c?

Slope-intercept form

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