Which answer is an equation in point-slope form for the given point and slope? point: (1,9); slope: 5

y - 1 = 5(x + 9)
y + 9 = 5(x - 1)
y - 9 = 5(x - 1)
y - 9 = 5(x + 1)

think the answer is c. do not just agree with me i think i'm wrong.
to whoever is going to answer. i will be marking the best answer the brainliest answer.

The table shows the distance traveled over time while traveling at a constant speed.

The rate of decay of a radioactive substance depends upon the amount present initially. the mass y (mg) of the radioactive substance cobalt-60 present in a sample at time t (years) is represented by the exponential equation y=50e −0.1315 t . answer the following questions in complete sentences. 1. how does the exponential equation above compare to the equation for simple interest that is compounded continuously? explain the similarities. 2. what is the initial amount of cobalt-60 in the sample? 2. how much cobalt-60 is left after 8.4 years? show your work. 3. what would be the y-intercept of the graph? what does it represent? 4. after how many years will the amount of cobalt-60 left be 6.25 mg? explain what happens to the cobalt-60 after 50 years? 5. discuss some “real-world” examples and uses of cobalt-60

Alcoa was $10.02 a share yesterday. today it is at $9.75 a share. if you own 50 shares, did ou have capital gain or loss ? how much of a gain or loss did you have ? express the capital gain/loss as a percent of the original price