please help on both questions i also need to show my work plz help and i'll mark you brainlist please

Use this data in the problem below. follow the steps carefully. round to the nearest tenth. lot 3: week 1: 345 week 2: 340 week 3: 400 week 4: 325 step 1. jim enters the data and calculates the average or mean. step 2. jim calculates the deviation from the mean by subtracting the mean from each value. step 3. jim squares each deviation to remove negative signs. step 4. jim sums the squares of each deviation and divides by the count for the variance. step 5. jim takes the square root of the variance to find the standard deviation.

Can someone me with my math problem pls my teacher is on my back about this

Which linear function represents the line given by the point-slope equation y + 1 = –3(x – 5)?