# 4. (3,8)(4,10)....first we find the slope
slope = (10 - 8) / (4 - 3) = 2/1 = 2
now we use y = mx + b
slope(m) = 2
use either of ur points...(3,8)...x = 3 and y = 8
now we sub and find b, the y int
8 = 2(3) + b
8 = 6 + b
8 - 6 = b
2 = b <===
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# 5. little tip.....if u have a set of points where x = 0......in ur table u have (0,-3)...then b, ur y intercept, is -3....because ur y int is when x = 0
