An account earns simple interest. (a) find the interest earned. (b) find the balance of the account.

1. $2600 at 3.2% for 4 years
interest
balance

2. $7500 at 8.5% for 3 months
interest
balance

y = 3x+4

step-by-step explanation:

to find the slope

slope = (y2-y1)/ (x2-x1)

    = (-8-4)/ (-4-0)

    = -12/-4

  = 3

using the slope intercept form of a line

y= mx+b

we know the slope is 3

we know the y intercept is 4 ( the point where it crosses the y axis or x=0)

y = 3x+4

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