Writing Equations from Tables
Mrs. Kuznia
Math 8
Day 54
Objective


Given a table of x and y values, we can
write an equation.
We do this by looking for patterns!!
Example
x
y
0
2
1
4
2
6
3
8
4
10
We need to use y= mx+b.
We need to determine 2 pieces, the m and
the b.
How do we get the m? Look in the y colums
for a pattern. This is the m.
How do we get the b? Find the 0 in the x
column, and match it with the y-value.
Continued
x
y
0
2
1
4
2
6
3
8
4
10
Example
x
y
0
10
1
6
2
2
3
-2
4
-6
Example
x
y
0
5
1
10
2
15
3
20
4
25
Example
x
y
2
3
3
6
4
9
5
12
6
15
Use the table to graph the appropriate line.
Then, give the equation of the line.
x
y
0
-2
1
-4
2
-6
3
-8
4
-10
Use the table to graph the appropriate line.
Then, give the equation of the line.
x
y
1
5
2
3
3
1
4
-1
5
-3