Question

Bob is selling floral arrangements. Each arrangement uses 1 vase and 15 tulips. Each vase costs Bob $4.00. Let C be the total cost of the arrangement and t be the cost of 1 tulip. Write an equation, in slope-intercept form, that represents the total cost of each arrangement to Bob.

Answer 1

There would be 15 tulips + 1 vase per each arrangement, so we could write:
15(t) + 4 =C

However, that if not in slope-intercept form. So, let us rewrite our equation...
We know that slope-intercept form is in the format y=mx+b, therefore our new equation must be, too. 
We will let C be our "y," 15(t) be our "mx" and 4 be our "b." Which would look like this:
C=15(t)+4
Which can be more simply written as:
C=15t+4.

Boom, that's your answer.
I hope this helped. 
Best of luck on your test/homework