Question

On which of the following lines does the point (7, 1) lie?

A.) y= 5x + 4
B.) y= -x + 8
C.) y= x- 10
D.) y= -4x + 3

Answer 1

For this case what we should do is evaluate the corresponding linear function with the following values:

`x = 7 y = 1`
We must verify that equality is met.
For the following function we have:

`y = -x + 8`
Substituting values:

`1 = -7 + 8`
Rewriting:

`1 = 1`
Therefore, the point (7,1) is on the line.
Answer:
B.) y = -x + 8