Answer to Question #265209 in Algebra for andy

Question

What is the y-intercept of the function f(x) = –x + ?

Answer 1

In mathematics, the y-intercept of a function, f(x), is the y-value of the point where the graph of f(x)crosses the y

y-axis. This occurs where x=0, so we can find the y-intercept of a function, f(x), by plugging x=0 into the function, which is equivalent to calculating f(0).

Where f(x) =-x+7

$\therefore$ f(0)=-0+7

f(0)=7

y-intercept of f(x) =-x+7, is equal to 7

$\therefore$ y-intercept =7