SOLUTION: How do i find the y-intercept of the graphs of the function y=3x^2-18x+15

Algebra ->  Quadratic Equations and Parabolas  -> Quadratic Equations Lessons  -> Quadratic Equation Lesson -> SOLUTION: How do i find the y-intercept of the graphs of the function y=3x^2-18x+15      Log On


   

Question 57988: How do i find the y-intercept of the graphs of the function y=3x^2-18x+15
Answer by hayek(51) About Me  (Show Source):
You can put this solution on YOUR website!
The y-intercept is defined as the value of the function when x=0 (x=0 means you are on the y-axis, look at the graph and you should see why.)
So, just plug in 0 for x and read the answer:
y=3%280%29%5E2-18%280%29%2B15.
So the y-intercept is highlight%2815%29.
graph%28300%2C200%2C-2%2C8%2C-30%2C30%2C3x%5E2-18x%2B15%29