Question

Steve plotted 3 points from the equation y = 3x on this coordinate grid. He drew a straight line through the points. Which ordered pair would also be on this line? A. (+5, +15) B. (+4, +7) C. (+5, +3) D. (+12, +4)

Answer 1

For this case we have the following linear function:
y = 3x
We note that the slope of the line is:
m = 3
Therefore, we must find which of the ordered pairs satisfies the equation:
For (5, 15) we have:
x = 5
y = 15
Substituting values:
15 = 3 (5)
Rewriting
15 = 15
The equation is satisfied.
Answer:
An ordered pair that would also be on this line is:
A. (+5, +15)