Substitution/Elimination
We use substitution when...
one variable is by itself
What symbol is used to represent slope?
m
What does b represent in slope intercept form?
y-intercept
What is the point-slope formula?
y - y1 = m(x - x1)
What is the next TWO terms of the arithmetic sequence: 2, 8, 14, 20 ___, ___?
y = 2x - 1
y = -x +2
Find x.
x = 1
Slope is also called ...
rate of change
What is the slope of
y= -2x + 3?
-2
What is the slope of the line
y - 1 = 3(x - 4)?
3
What are the next TWO terms of the arithmetic sequence: 24, 20, 16, 12, _____, ______
8 and 4
y = 4x - 1
y = x + 5
Find x and y.
(2,7)
What are the four types of slope?
positive, negative, zero, undefined
Write the equation of a line that has a slope of 6 and a y-intercept of 2
y= 6x + 2
What is a point on the line
y - 3 = 2(x - 1)?
(1, 3)
What is the 10th term in the sequence: 3, 8, 13, 18?
48
x + 2y = 11
y = x + 1
Find x and y.
(3,4)
Find the slope of the line containing (2, 1) and (4, 3)
1
Write the equation of a line with a slope of 4 and y-intercept of -1
y= 4x - 1
Write the equation of a line in point-slope form that has a slope of -1 and contains the point (2,1).
y - 1 = -1(x - 2)
What is the 27th term of the arithmetic sequence: 9, 13, 17, 21
113
2x + y = 3
3x -2y = 8
Solve using elimination for x and y.
(2,-1)
Find the slope of the line containing (-1, 0) and (-2, -3).
3
Write the equation of a line with a slope of -3 and a y-intercept of -7
y = -3x - 7
Write the equation of a line in point-slope form that has a slope of -1 and contains the point (0,-2).
y + 2 = -x
On March 1st, the temperature outside is 31 degrees. Each day, it gets 2 degrees warmer outside. What is the temperature on March 14th?
57 degrees