Question

i need help on a couople of questions.....

find the slope of these lines.
y=2x+7 y=7 x=-4
2x+y=15

Answer 1

Try to convert each equation to the form y = m⋅x + c, then m is the slope. When there is no x, the slope is 0 and when there is no y the slope is ∞.

Answer 2

1. radq is right. y = m⋅x + c where m-number and c-number. therefore in y=2x+7 (which is as i understand a tangent line) slope=2. When you have 2x+y=15 you need to arrange it: y=-2x+15. Therefore slope=-2.

Answer 3

You have x=-4 and y=7 what is has to do with the question?

Answer 4

slope of y=7 is 0. slope of x=-4 is 0 as well

Answer 5

actually to understand why it is so -you must understand the concept of slope. slope-it is speed of the curve. how fast it is increasing/decreasing. y=7 is a straight line. it has no speed as it does not increase/decrease. same with x=-4. y=2x+7-draw it. you will see that it goes up. means increasing.

Answer 6

hmmm-in a case of x it is undefined.

Answer 7

x=-4 i mean