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Physics Classroom is making strides to make our site accessible to everyone. Our site contains 6 navigation areas. The Primary, Secondary, and Page Level navigations have a screen reader version of their nav structure that allows using the left and right keys to navigate sibling navigation items, and up or down keys to navigate parent or child navigation items. The others can be navigated using tabs. The Primary Navigation handles the first 2 levels of site pages. The Secondary (which is not always available) handles the 3rd and 4th level of structure. The Page level navigation allows you to navigate the current page's headings quickly. The Header Navigation contains the Light/Dark Mode toggle, Search, Notifications and account login. The Breadcrumb Navigation contains the breadcrumb of the current page. If the current page has a breadcrumb, you can get to it by skipping to the content and tabbing in reverse (shift plus tab). The Footer Navigation contains links such as Privacy, Contact, about and terms. Some resources contain an Audio Player that can be activated by holding down the T key for 3 seconds, and then using K to pause and resume. While not every area of Physics Classroom is usable purely from keyboard and screen reader, we are committed to continue work on making this possible. If you have questions or need additional help, please use this link to contact us.

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Calculating Slope - Directions

Using the Calculating Slope Concept Builder is quite simple. There are three difficulty levels. Each level involves he same task and the same directions - calculate the slope of a line, enter it into the answer field and tap on the Check Answer button. To determine the slope, you will need to know the coordinates of points on the line. There are six data points on every graph. Tap on a data point to view the x,y coordinates for that data point. They are displayed above the graph. Once you calculate the slope from the coordinate values, you will have to enter it into the answer field. You can do this one of two ways. You can tap into the answer field and enter the value using the keyboard of your device. This works great if you're working on a computer. But if you are on a mobile device, we recommend that you use our built-in number pad. Simply tap on the number pad icon. When you do, a number pad will pop up along the right side of the Concept Builder. Use the number buttons of the Number Pad to enter your answer. Then tap on the Enter button at the bottom of the Number Pad. When you are satisfied with your answer, tap on the Check Answer button. You will receive immediate feedback and your Progress Report will be updated.

Your goal is to earn "Stars" and to complete one or more difficulty levels. Stars are earned when you show success on a particular question. Once you show success on all the questions of a particular level, you will earn the Trophy for that level.

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