Which of the following is the equation of a line that passes through (-2, -1) and (-4, -3)

a. y = 1/2x + 1
b. y = x +1
c. y = 1/2x - 1
d. y = x -1

i already know the answer is b but how do you solve questions like these?

What is the lcm of 16 and 40 ? 24 and 40 ?

Three consecutive even numbers have a sum between 84 and 96. a. write an inequality to find the three numbers. let n represent the smallest even number. b. solve the inequality. a. 84 ≤ n + (n + 2) + (n + 4) ≤ 96 b. 78 ≤ n ≤ 90 a. 84 < n + (n + 2) + (n + 4) < 96 b. 26 < n < 30 a. 84 < n + (n + 1) + (n + 2) < 96 b. 27 < n < 31 a. n + (n + 2) + (n + 4) < –84 or n + (n + 2) + (n + 4) > 96 b. n < –30 or n > 31

Which graph represents the same relation as the table below? x f(x) –2 5 0 1 1 –1 2 –3