If you have a picture that shows line c on a graph, you could find your y-intercept or b. If not, you need the y-intercept to make an equation.
None of the above
0.6 would be equivalent to 0.60 and 0.600 and 0.600000...but none of the above answers
1: given 2: distributive property 3: multiplication property of equality 4: addition property of equality 5: division property of equality