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Standard Form Equations Of Lines Direct Variation 10 Point 20 Points 30 Points 40 Points 50 Points 10 Point 20 Points 30 Points 40 Points 50 Points 30 Points 40 Points 50 Points Horizontal/ Vertical Slope- Intercept
What is the slope of y = 5x – 3?
5
What is the y-intercept of y = 4x -2?
-2
Rewrite 2x + 4y = 8 in slope-intercept form.
Y = -1/2 x + 2
Graph y = -2x + 3.
Find the slope of -9x + 3y = 6.
3
Find the x- intercept of 3x + 9y = 27
9
Find the y- intercept of 4x – 5y = 10.
-2
Find the x and y- intercepts of -2x + 4y = 16
x int = -8 or (-8,0) y int = 4 or (0,4)
Graph x + 2y = 4 using the x and y- intercepts.
Glazed doughnuts are $5 per box. Lemon are $6 per box. You need to raise $600. Write a linear model.
5x + 6y = 600
True or False. X = 3 is a vertical line.
True
True or False. Y = 4 is a vertical line.
false
Graph x = 1
Graph y = -1
Which line is a horizontal line? A) x = 2 B) y = 2 C) y = 2x +2
B) y = 2
What is the slope- intercept form of the line? Slope = 5 y-int= 8
Y = 5x + 8
Write the point- slope form. Slope = 4 Point (2,1)
y – 1 = 4(x – 2)
Write the slope- intercept form of the line containing (1, -3) and perpendicular to Y = -1/4 x + 7
Y = 4x - 7
Write the slope – intercept form of the line passing through (1, 4) and (2, 6).
Y = 2x + 2
In 1980, a company made $6000. In 1990, the company made $36,000. A) Write a linear model. Let x = 0 represent B) Predict the profit in 2000.
A) y = 3000x B) $66, 000
X and y vary directly. Y = 24 when x = 6 Write an equation that relates the variables.
Y = 4x
X and y vary directly. Y = 18 when x = 2. Find y when x = 5
45
The graph of y = kx will: A) always have a positive slope B) be a horizontal line C) pass through (0,0)
Does the table represent direct variation? If yes, give the equation. X y
Yes Y = 1/6 x
The area varies directly with the width. A= 20 when w = 4. A) Write the equation. B) Then find the area when the width is 10.
A) A = 5w B) 50