Equations of Straight Lines (VCE SSCE General Mathematics): Quizzes

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Equations of Straight Lines
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In the equation y=a+bxy = a + bx, what does aa represent?

The y-intercept

In the equation y=a+bxy = a + bx, what does bb represent?

The slope

What is the y-intercept of y=6+9xy = -6 + 9x?

6-6

What is the slope of y=105xy = 10 - 5x?

5-5

Using m=y2y1x2x1m = \frac{y_2 - y_1}{x_2 - x_1}, find slope through (1,7)(1, 7) and (4,2)(4, 2).

53\frac{-5}{3}

Write the equation with y-intercept =9= 9 and slope =6= 6.

y=9+6xy = 9 + 6x

What is the slope of y4x=5y - 4x = 5 when rearranged?

44

What does a negative slope indicate about a line?

The line is decreasing (downward L to R)

In the slope formula, what does y2y1y_2 - y_1 represent?

The rise (vertical change)

For y=8+2xy = 8 + 2x, what is yy when x=5x = 5?

1818

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