Slope of the line
(3-(-5)) / (-5-(-1))
8 / -4
-2
Hi there’s some math apps for this
Answer:

<h3><u>For the 1st part</u></h3>




<h3><u>For the 2nd part</u></h3>
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Firstly, the rate of increase of Canton = 80/7720 = 0.010
The rate of increase of HP = 120/3200 = 0.0375
Apply the formula of compound interest==> A =A'(1+i)^n
The population will be equal when the following equality is satisfied
7720(1+0.01)^n = 3200(1+0.0375)^n
or
7720x1.01^n = 3200x1.0375^n
Divide both sides by 3200 ===>(193/80)x1.01^n=1.0375^n