Is y=1/2x+7 a function

The scatterplot below shows the number of hours that students read weekly and the number of hours that they spend on chores weekly. which statement about the scatterplot is true?

Rewrite the following quadratic functions in intercept or factored form. show your work. f(x) = 3x^2 - 12

Ellen makes and sells bookmarks. she graphs the number of bookmarks sold compared to the total money earned. why is the rate of change for the function graphed to the left?