Suppose � ( � ) = 7 � f(x)=7 x ​. a) What is the domain of � ( � ) ? f(x)?​​ Domain Preview ​ b) What is the range of � ( � ) ? f(x)?​​ Range Preview ​ c) What is the � y​-intercept of � ( � ) ? f(x)?​​ Enter your answer as an ordered pair. � -intercept y-intercept Preview ​ d) Is � ( � ) f(x)​ an increasing or decreasing function? Increasing Decreasing ​ e) What is the equation of the horizontal asymptote?