Question

Which of the following best describes Y=3x+9. •a.neither linear nor nonlinear •b.linear •c.nonlinear •d.both linear and non linear

Answer 1

The answer is B) linear.

Explanation:
This equation is in slope-intercept form, which is y=mx+b. It has a constant rate of change, m=3, which tells us that for every increase in x, there is a constant increase in 1. This is what makes it linear.

Answer 2

It is linear because it is an equation of a line.   

Equation of a linear line:
y = mx + b

Your equation
y = 3x + 9

Answer is B