Question

What is the y-intercept of the function f(x)=2x?

options:

(0, 2)

(0,1)

(3, 27)

(−2, 9)

Answer 1

to get the y-intercept of any function, we simply set x = 0 and solve for "y", bearing in mind that x = 0 at that point.

`\bf \stackrel{f(x)}{y}=2x\implies y=2(\stackrel{\stackrel{x}{\downarrow }}{0})\implies y=0~\hfill \blacktriangleright (0,0) \blacktriangleleft\\\\\\~\hspace{32em}`