Find the equation of a line given the point and slope below. arrange your answer in the form y = mx + b, where b is the constant.
(1, 3)
m = 3
i need with this question and others like it, an explanation would be great, im on a deadline and need to finish these as soon as possible ty

Adiverr from the university of florida women’s swimming and diving team is competing in the ncaa zone b championships

Ariana starts with 100 milligrams of a radioactive substance. the amount of the substance decreases by 20% each week for a number of weeks, w. the expression 100(1−0.2)w finds the amount of radioactive substance remaining after w weeks. which statement about this expression is true? a) it is the difference between the initial amount and the percent decrease. b) it is the difference between the initial amount and the decay factor after w weeks. c) it is the initial amount raised to the decay factor after w weeks. d) it is the product of the initial amount and the decay factor after w weeks.

How many times larger is 6 × 10^12 than 2 × 10^7? a. 30,000 b. 3,000 c. 3,000,000 d. 300,000