Line graphs that indicate time along the x-axis can be used to predict what would happen to dependent variables in an experiment at a later point in time
O only if the existing line shows an upward trend.
only if the existing line shows a downward trend.
Of a new variable was introduced to the experiment.
O if the experiment continued under the same conditions.

if the experiment continued under the same conditions

Explanation:

you can only go on to prove something if its under the same conditions

b

explanation:

9.9 years

a = p(1 + rt) . . account balance after time t at rate r starting with principal p

3000 = 2500(1 + 0.0202t) . . filling in the given numbers

1.2 = 1 + 0.0202t . . divide by 2500

0.2 = 0.0202t . . . subtract 1

0.2/0.0202 = t ≈ 9.901

it will take about 9.9 years for the account balance to reach $3000.