Question

Find the equation of a line that has a slope of -2 and a y-intercept at (0,9)

Answer 1

\( \color{Black}{\Rightarrow y = -2x + b }\)

Plug in x and y and then solve for b.

Answer 2

y intercept at (0,9) means that y-intercept = 9

Answer 3

Another way to do it is that we know that the y-intercept is 9, so we may say that b = 9. We already have it....<tips cap>