(03.01 MC) PQ and RS are two lines that intersect at point T, as shown below:

Two lines PQ and RS intersect at point T. Angles PTS and RTQ are shown congruent.

Which fact is used to prove that angle PTS is always equal to angle RTQ? (1 point)

Sum of the measures of angles RTQ and QTS is 180°.

Lines PQ and RS intersect at an angle greater than a right angle.

Line segments PQ and RS do not have a fixed length.

Sum of the measures of angles PTR and QTS is 180°.

answer: c, the green line

step-by-step explanation:

there is no black line, eliminate b.

simple interest implies periodic payments, but the red line shows no payments, eliminate d.

simple interest has equal payments. if paid say every day, the graph is about a straight line (actually a stairstep).

the yellow line is not straight, eliminate a.

check: the green line is straight, answer is c.

simple interest with positive interest rate gives a straight line sloping up to the right. green line:

g(t) = $100 + ($200-$100) ÷ (20 years) × (t years)

= $100 + (4%/year) × ($100)(t years)

incidentally, the yellow line curving upward represents continuously compounded interest

y = $100 × 2^(t years / (14 assuming the yellow line hits $200 at 14 years. 2^0 is 1, so y(0) = $100; 2^(14/14) is 2, so y(14) = $200.

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