4. If four out of twenty patients suffered serious side effect from a new medicine. Test the null hypothesis = 0.5 against the alternative is not equal to 0.5 at 5% level of significance. ​

Karianne and lucius are analyzing a linear function on a graph. karianne says that unit rate is equal to rate of change, but that slope is calculated differently. lucius says that unit rate, rate of change, and slope are calculated the same way. who is correct? explain your answer.

Find the value of the variable and the length of each secant segment

Amanda went into the grocery business starting with five stores. after one year, she opened two more stores. after two years, she opened two more stores than the previous year. if amanda expands her grocery business following the same pattern, which of the following graphs represents the number of stores she will own over time?