Algebra 2A Module 06

Front

What is the solution to the equation 2x + 15 = 225?

Back

x = 105

Front

If x increases then y increases, what type of variation is this?

Back

Direct variation

Front

If p varies directly as r and inversely as t, what does this imply about the relationships between these variables?

Back

p = k * (r/t) for some constant k.

Front

What is the value of t when r = 10 and p = -5, given that t = 20 when p = 4 and r = 2?

Back

t = -80

Front

Define direct variation.

Back

Direct variation is a relationship between two variables where their ratio is constant.

Front

What is the formula for direct variation?

Back

y = kx, where k is a non-zero constant.

Front

What is the formula for inverse variation?

Back

y = k/x, where k is a non-zero constant.

Front

If y varies directly with x and y = 12 when x = 3, what is the value of y when x = 6?

Back

y = 24.

Front

What does it mean if two variables are inversely related?

Back

As one variable increases, the other decreases.

Front

If p varies directly as r and inversely as t, what happens to p if r is doubled and t is halved?

Back

p increases by a factor of 4.