"I tried several combinations using -3,2,and -1 in place of m but still not coming out right."
Are you missing part of this problem?
There is no 'm' anywhere in your posted problem to replace?
I had to repost this since I hit the submit button by mistake
Use patterns or a linear equation to complete the table.
column x 1,3,5,10,50,100
column y -1,3,7,?,?,?
I tried several combinations using -3,2,and -1 in place of m but still not coming out right.
Our options for the question marks
a)17,97,197
b)17,37,97
c)-10,-50,-100
d)23,97,197
Help please
2 answers
since you say it is "linear", let
y = mx + b
using the 2nd and 3rd data values
3 = 3m + b
7 = 5m + b
subtract them
4 = 2m
m=2
into the first
3 = 6 + b
b = -3
equation:
y = 2x - 3
the first data point satisfies this.
so now when x=10
y = 17
when x=50
y = 97
when x=100
y = 197
looks like a)
y = mx + b
using the 2nd and 3rd data values
3 = 3m + b
7 = 5m + b
subtract them
4 = 2m
m=2
into the first
3 = 6 + b
b = -3
equation:
y = 2x - 3
the first data point satisfies this.
so now when x=10
y = 17
when x=50
y = 97
when x=100
y = 197
looks like a)