20 questions
A graph is proportional if...
It is straight
It passes through the origin
Its straight and it passes through the origin
How do you find the constant of proportionality for a graph?
Pick a point on the line and use the formula x/y
Pick a point on the line and use the formula y/x
Does this graph show a proportional relationship?
Yes, because it is straight
Yes, because it goes through the origin
Yes, because it is straight and goes through the origin
No, it is not
Does this graph show a proportional relationship?
Yes, because it is a straight line
Yes, because it goes through the origin
Yes, because it is a straight line and goes through the origin
No, it is not