State whether the given equation or function is linear. write yes or no. explain your reasoning. f(x) = 7x2 + 4

yes, the equation is linear. it is of the form f(x) = m + b
yes, the equation is linear form. it is of the form f(x) = mx + b.
no, the equation is not linear. it is in the form x + y = c.
no, the equation is not linear. it is not of the form f(x) = mx + b.

For this case we have the following function:

By definition, we have that a linear equation is of the form

On the other hand, a quadratic equation is of the form

Then, the given equation is not a linear equation, it is not of the form

No, the equation is not linear. It is not of the form

time is equal to distance over rate so

t = d/r

need a little bit more information for the second question.