Question

Which equation represents the graph of the linear function?



A.
y = 3x

B.
y = 3

C.
y = −3

D.
y = −3x

Answer 1

When the slope is positive, graph goes up (from left to right).
When the slope is negative, graph goes down.
When y= (a constant), the graph is horizontal.
The y-intercept is the value of the constant in the last case.