100 points

1. what is the equation for the line?

2.what is the equation of a line with a slope of 3 and a point (3, 1) on the line?

express the equation in the form of y=mx+b where m is the slope and b is the y-intercept.

3.the graph shows the amount of money roberta saves each week.

what does the initial value mean for this function?

roberta saves $10 each week.

after 4 weeks, roberta has $90.

roberta had $50 before she started to save money each week.

roberta had no money until she started to save $10 a week.