Substitution
Fill in the blank. In order to use the substitution method correctly, you need a(n) ________ variable.
isolated
What is the formula we use for writing linear equations in slope-intercept form?
y=mx+b
What is the formula we use to find slope?
rise/run OR y-y/x-x
What is the full date (day of the week and day) of our Unit #3 assessment?
Wednesday, May 25th
Solve the following systems of equations using substitution. y=5x+2 and x=1
(1,7)
What variable do we use to represent slope in our formula for slope-intercept form?
m
Fill in the blanks. What is another vocabulary term that we use for slope: _______ of ______
rate of change
What is the correct way that we write an ordered pair?
(x,y)
Solve the following systems of equations using substitution. y=3x and y=9
(3,9)
Write a linear equation with a slope of 1/3 and a y-intercept of -2.
y = 1/3x-2
If you see a horizontal line on a graph for a linear equation, what does this tell you about the slope?
it has a slope of zero
If there are parallel lines for a system of equations, how many solutions does this system have?
Solve the following systems of equations using substitution. 12y=3x+12 and x=2y
(4,2)
Write a linear equation with a slope of 0 and a y-intercept of 5
y = 5
Identify the slope of the following linear equation: y=3x-4
slope = 3
Solve for x in the following linear equation: 3x+7=16
x = 3
Solve the following systems of equations using substitution. y=4x-3 and y=3x+1
(4,13)
Write a linear equation for a line that passes through the points (1,2) and (3,3) and has a y-intercept of 1.
y=1/2x+1
Find the slope of the line that passes through the points (2,1) and (4,6)
slope = 5/2
Solve for x in the following linear equation: 4x+2=7x+8
x = 2