Graphing Lines
What is the m and b?
y=-5x+7
b=7
4x-5=11
x = 4
What is the first step to solve this using elimination?
2x - 3y = 22
2x + 5y = 6
Subtract line 2 from line 1 (Distribute a negative to Line 2)
Find the slope between
(2,4) and (5,8)
Slope = 3/4
Go down 2 then to the right 5
Or something similar.
Graph this line on your coordinate plane.
y=-2x+1
Check graph.
2x+4-5=7
x=4
y = -3x - 4
8x - 5y = -26
8x - 5(-3x - 4) = -26
Find the slope between
(-5, 2) and (-3, 4)
Slope = 1
Find the Value of y when x=3 of:
y=2x+3
y = 9
Graph this line on your coordinate plane.
y=x+3
Check graph
-(-x-3)+2=7
x=2
4x + 7y = 6
-5x + y =12
Distribute a -7 to line 2
Find the slope between the two points:
(2,6) and (-3,9)
Slope = 3/-5
Describe what a solution to a system of equations looks like on a graph.
It is the point where the two lines intersect.
Graph this line.
y=-2/3x+2
Check graph
6(6x+6)-5=1+6v
x=-1
Solve using Substitution
y = -4x - 5
y = -x - 8
(1,-9)
Lucy has $100 and save $15 every week.
Write an equation in slope form modeling this.
y=15x+100
Solve for x
-4x + 3 = 2x + 15
x = -2
Graph this line
y=4
Horizontal Line, check graph
26+x=5(3x-6)
x=4
Solve Using Elimination
3x - 8y = 6
5x - 16y = 18
(-6, -3)
There are 49 math students. Every week 6 math students drop out of the class. Write an equation to model this.
Write the equation that goes with this explanation:
"I start my graph on positive 2 on the y-axis, then I go up 3 units and to the right 7 units."
y = 3/7x + 2