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Home > AC > Chapter 7 > Lesson 7.3.1 > Problem 7-90

7-90.
  1. Without graphing, identify the slope and y-intercept of each equation below. Homework Help ✎

    1. y = 3x + 5

    2. y = 5/-4x

    3. y = 3

    4. y = 7 + 4x

    5. 3x + 4y = −4

    6. x + 5y = 30

See the hint above.

Slope = 3
y-intercept = (0,5)

This equation is the same as:

y-intercept = (0,0)

If there is no x-value in the equation, can there be a slope or is it 0?

Slope = 0
y-intercept = (0,3)

See part (a) and the first hint in the problem.

Solve the equation for y. By doing this, you put the equation in y = mx + b form.

Subtract by 3x on each side.

4y = −3x − 4

Divide by 4 on both sides.

See part (e) and the first hint in the problem.