Write an equation of a line in slope intercept form with the slope of 8 and a y-intercept of -4

Li buys supplies so he can make and sell key chains. he begins to make a profit only after he sells 4 key chains. what point on the graph makes the most sense in this situation?

In the xy-plane, if the parabola with equation passes through the point (-1, -1), which of the following must be true?

Calculate the average rate of change over the interval [1, 3] for the following function. f(x)=4(5)^x a. -260 b. 260 c. 240 d. -240