Writing Equations
Write an equation of a line with a slope of 1/2 and a y-intercept of 5.
y = 1/2 x +5
Write an equation of a line with a slope of 6 and a y-intercept of 0.
y = 6x
Write the equation of the line of best fit.
x 1 2 3 4 5
y 1 2 1.3 3.75 2.25
y= .425x + .785
What is the slope of a line parallel to y = 4/3 x + 5?
4/3
Do the following points represent direct variation, inverse variation, or neither?
(3, 12), (-4, -16), (7, 28), (12, 48)
Direct
Rewrite the equation in slope-intercept form.
3x - 2y = 8
y = 3/2 x -4
Rewrite the equation in slope-intercept form.
4x - y = -18
y = 4x + 18
Write the equation of the line of best fit for the points (9, 260), (13, 320), (21, 420), (30, 530)
Your answer must be correctly rounded to the thousandths place.
y = 12.744x + 149.923
What is the slope of a line perpendicular to the line 5x - 6y = 24
-6/5
Do the following points represent direct variation, inverse variation, or neither?
(2, -5), (-20, 0.5), (10, -1), (1, -10)
Inverse
Rewrite the equation in standard form
y = 3/4 x - 1
3x - 4y = 4
Rewrite the equation in standard form.
y = x - 4
x - y = 4
Write an equation for a line of best fit.
x y
3 20
8 53
9 43
11 60
Your answer must be correctly rounded to the thousandths place.
y = 4.806x + 6.755
Write an equation of a line parallel to the line y = x - 1 that goes through the point (-5, 1).
y = x + 6
Is the following equation direct variation, inverse variation, or neither?
2x - y = 8
Neither
Write the equation of the line that goes through the points (5, 5) and (-5, 7).
y = -1/5 x + 6
Write the equation of the line that goes through the points (-3, 5) and (-3, 8).
x = -3
Write the equation for the line of best fit. Then determine the value for y when x = 3.
x y
-1 5
0 -2
4 -8
-6.239
Write an equation of a line parallel to the line x + 2y = 4 and goes through the point (8, 4).
y= -1/2 x + 8
Is the following equation direct variation, inverse variation, or neither?
x/3 = y
Write the equation of the line that goes through the points (3, 4) and (-4, -3)
y = x + 1
Write the equation of the line that goes through the points (-2, 7) and (1, -8).
y = -5x - 3
Write the equation for a line of best fit. Then determine the value of y when x = 70.
x y
40 8
30 12
25 9.5
4.347
Write an equation perpendicular to the line 5x + 3y = 18 and goes through the point (5, 5).
y = 3/5 x + 2
Is the following equation direct variation, inverse variation, or neither?
-4/y = x
Inverse