Mrs. alberts has taught seventh-grade math for thirty years. every year she calculates and records the class average on the final exam. the following dot plot represents these average scores from the past thirty years.
what percent of the scores lie within one mean absolute deviation (either way) of the mean? round to the nearest percent and express your answer as a numerical value.
note: use the rounded mean and mean absolute deviation. %

The table below represents the displacement of a fish from its reef as a function of time: time (hours) x displacement from reef (feet) y 0 4 1 64 2 124 3 184 4 244 part a: what is the y-intercept of the function, and what does this tell you about the fish? (4 points) part b: calculate the average rate of change of the function represented by the table between x = 1 to x = 3 hours, and tell what the average rate represents. (4 points) part c: what would be the domain of the function if the fish continued to swim at this rate until it traveled 724 feet from the reef? (2 points)

Does anyone know how to solve and graph this: 4 + | a + 2 | < 7the only part i don't get is the "4 +"

With both problems. a.s.a.p directions on photo ^