Suppose y varies directly with x. Write a direct variation equation that relates x and y. Then find the value of y when x=7. 1. y=8 when x=−4.
2. y=3 when x=9.

An equation where variables are used to represent known values—function notation true or false

Every weekday, mr. jones bikes from his home to his job. sometimes he rides along two roads, the long route that is shown by the solid lines. other times, he takes the shortcut shown by the dashed line. how many fewer kilometers does mr. jones bike when he takes the shortcut instead of the long route?

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