Write a function that takes as input a model object (variable) fit via lm() and outputs a fitted versus residuals plot. Also, create arguments pointcol and linecol, which control the point and line colors, respectively. Code the plot to add a horizontal line at y=0, and label the x-axis "Fitted" and the y-axis "Residuals"

In a compound condition, both conditions on either side of the logical operator and must be true for the overall condition to be true. a: true b: false

What are some websites that you can read manga (ex: manga rock)

Two students are discussing the flow of electricity. student a says that voltage is a measure of the amount of electron flow in a circuit. student b says that power is the product of voltage and current. which of the following statements is correct? a. only student a is correct b. only student b is correct c. both of the two students are correct d. neither of the two students is correct