Identify the graphs that represent a linear function. Check all that apply. On a coordinate plane, a line has a positive slope. On a coordinate plane, a curve opens down. On a coordinate plane, a graph decreases, increases, and then decreases again. On a coordinate plane, a line has a negative slope.

Sandy is upgrading her internet service. fast internet charges $20 for installation and $52.45 per month. quick internet has free installation but charges $57.45 per month. part 1 out of 2 complete the equation that can be used to find the number of months after which the internet service would cost the same. use the variable x to represent the number of months of internet service purchased.