Practice problem
For which of the following functions is it true that f(cx)=c⋅f(x)f(cx) = c \cdot f(x)f(cx)=c⋅f(x)?
f(x)=5xf(x) = 5xf(x)=5x
f(x)=x−3f(x) = x - 3f(x)=x−3
f(x)=x118f(x) = \frac{x}{118}f(x)=118x
f(x)=2xf(x) = 2^xf(x)=2x
f(x)=x2f(x) = x^2f(x)=x2
Type a concept, like “slope” or “photosynthesis”.