Write a linear equation that passes throughthe point (2, -9) and has a slope of -5 in slope-intercept form. Help pls

Solve the system of equations. y= 2x y= x^2 - 15

Noel is hoping to make a profit (in $) on the school play and has determined the function describing the profit to be f(t) = 8t – 2654, where t is the number of tickets sold. what does the number 8 tell you?

Which best describes the function on the graph? direct variation; k = −2 direct variation; k = -1/2 inverse variation; k = −2 inverse variation; k = -1/2