I have created this UX page as Board design according to the instructions given in the lesson 13.11.2 Activity: Create price and Cost growth assumptions page. The lesson says combination chart but I ended up with this view. Would appreciate some help.
Yes it is supposed to be a combination chart but it doesn't mean that all three has to be displayed as line charts. If you look at the card configuration window, go to Chart Option and change it to bars, area and bars instead of line, line and line. You can also change the colors as per the mock up given