equation of a line?

Question

find the equation of a line with a slope  of-2/3 which passes  through the point 3,-1?

Answer 1

The slope = -2/3
The point = (3, -1)

Use the point slope form to figure out the equation of the line:
y - y1 = m(x - x1)
y - (-1) = -2/3(x - 3)
y + 1 = -2/3x + 2
y = -2/3x + 1

Answer 2

write each expression in radical notation. Evaluate the expression by hand (16)3/2

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Answer 3

when a ball is thrown in the air,the height h of the ball in feet.t seconds after the ball is thrown in the air, is given by the equation height=25t-16t^