| minutes x | 100 | 200 | 300 | 400 | 500 |
| costs of plan, y | 14 | 20 | 26 | 32 | 38 |
Fingue out the following below:
Two ordered pairs:
Slope:
Find b:
Equation:
Thx
+980 | minutes x | 100 | 200 | 300 | 400 | 500 |
| costs of plan, y | 14 | 20 | 26 | 32 | 38 |
Fingue out the following below:
Two ordered pairs: I'm assuming this means (100, 14) and (200, 20) although I am not sure.
Slope: Also called the gradient, or m, the slope is how much y increases in relation to x, in the form rise/run. In these two points; x increases by 100, and y increases by 6. So the slope is 6/100, or 3/50.
m = 3/50
Find b: b is the y intercept, which can be found when x = 0. If y goes down by 6 every time x decreases by 100 then the y-intercept has to be 8, according to the point (100, 14).
b = 8
Equation: y = mx + b is the slope-intercept form.
By substituting our values:
y = 3/50 x + 8
Lets check this for point (300, 26)
26 = 3/50 * 300 +8
26 = 900/50 + 8
18 = 900/50
18 = 18
yay :)
+980 | minutes x | 100 | 200 | 300 | 400 | 500 |
| costs of plan, y | 14 | 20 | 26 | 32 | 38 |
Fingue out the following below:
Two ordered pairs: I'm assuming this means (100, 14) and (200, 20) although I am not sure.
Slope: Also called the gradient, or m, the slope is how much y increases in relation to x, in the form rise/run. In these two points; x increases by 100, and y increases by 6. So the slope is 6/100, or 3/50.
m = 3/50
Find b: b is the y intercept, which can be found when x = 0. If y goes down by 6 every time x decreases by 100 then the y-intercept has to be 8, according to the point (100, 14).
b = 8
Equation: y = mx + b is the slope-intercept form.
By substituting our values:
y = 3/50 x + 8
Lets check this for point (300, 26)
26 = 3/50 * 300 +8
26 = 900/50 + 8
18 = 900/50
18 = 18
yay :)
