Write the equation of a line with a slope of −2 and a y-intercept of 5.

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  y = -2x +5

Step-by-step explanation:

The slope-intercept form of the equation for a line is ...

  y = mx + b . . . . . . . . . line with slope m and y-intercept b

You want a line with slope -2 and y-intercept 5, so your equation is ...

  y = -2x + 5

4 weeks change = -20

1 week change = -5

If x is the temperature at the start of the week:

A: (4x-20)/4

B: Change per week = x-5 This means that the temperature goes down by 5 degrees per week, with x being the temperature at the start of the week.

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