(1) Today, the temperature in New York is -1 degree and is expected to rise 3 degrees per day. It's 6 degrees in Alaska and expected to fall 1 degree every 2 days.

  New York: m=3, b=-1, y=3x-1

  Alaska: m=-1/2, b=6, y=-1/2x+6

  2 days; 5 degrees

Step-by-step explanation:

In each case, m is the rate of change, the number of degrees per day that the temperature is changing. 1 degree per 2 days is 1/2 degree per day.

In each case, b is the given initial temperature.

The equation is y = mx + b, for the values of m and b that you fill in.

New York

  m = 3, b = -1, equation: y = 3x -1

Alaska

  m = -1/2, b = 6, equation: y = -1/2x +6

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The graphs can be plotted by plotting the initial point on the y-axis, then finding another point based on the slope.

For New York, another point will be 1 unit right and 3 units up, at (1, 2).

For Alaska, another point will be 2 units right a 1 unit down, at (2, 5).

The lines intersect at the point (2, 5) corresponding to 2 days, 5 degrees.

step-by-step explanation:

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