What is the slope of the line that passes through (3,-7) and (-1,1)

Solve with work both bert and ernie received an increase in their weekly salaries. bert's salary increased from $520 to $520. ernie's salary went from $580 to $645. find the percent of increase for each salary. what was the larger of the two percents ?

Need solving this second acceleration problem.

This is so hard and it’s for a test