It’s the last one:
Area is length times width
So you first have to add the length
The once you get that new value, you multiply it times the width
16 x 10 = 160 crayons to use.
each student gets 16 crayons.
The x-intercept is + 6 and the y-intercept is + 10
0.03x + 15 y = 0.03x - 15 y = -0.03x + 15 y = -0.03x - 15